CIC Certification in Infection Prevention and Control Exam — Questions and Answers

Question 1: Which element of the ICRA matrix helps determine the appropriate infection control barrier class during healthcare construction?

The age of the building being renovated
The number of construction workers involved in the project
The type of construction activity AND the risk group of patients in the adjacent area (Correct answer)
The construction budget and timeline only

Correct answer: The type of construction activity AND the risk group of patients in the adjacent area

The ICRA matrix combines the construction activity type (Type A–D) with the patient risk group (Group 1–4) to determine the required containment class (I–IV).

Question 2: An IP professional needs to communicate a complex infection risk to non-clinical administrators. The most effective approach is to:

Translate clinical data into financial impact and patient safety language that aligns with executive priorities (Correct answer)
Use highly technical clinical terminology to demonstrate expertise
Provide a lengthy written report with full statistical analysis
Avoid presenting to administrators and route concerns only through nursing leadership

Correct answer: Translate clinical data into financial impact and patient safety language that aligns with executive priorities

Translating IPC data into financial and safety terms relevant to administrative priorities increases understanding and the likelihood of resource allocation and action.

Question 3: Which occupational health measure is MOST important for preventing healthcare worker transmission of influenza to patients?

Mandatory droplet precautions during influenza season for all staff
Mandatory fit testing for N95 respirators each fall
Annual influenza vaccination of all healthcare personnel (Correct answer)
Prophylactic oseltamivir for all unvaccinated staff

Correct answer: Annual influenza vaccination of all healthcare personnel

Annual influenza vaccination of healthcare personnel is the single most important measure to reduce HCW-to-patient transmission and protect HCW health.

Question 4: An IP professional wants to implement a change in isolation precaution signage. Which change management model focuses on creating urgency, building a guiding coalition, and generating short-term wins?

Plan-Do-Study-Act (PDSA) Cycle
Kotter's 8-Step Change Model (Correct answer)
SWOT Analysis Framework
Lewin's Three-Step Model

Correct answer: Kotter's 8-Step Change Model

Kotter's 8-Step Change Model specifically includes steps for creating urgency, forming a powerful coalition, and achieving short-term wins to sustain organizational change.

Question 5: A staff nurse reports feeling unsafe speaking up about IPC concerns due to fear of retaliation. The IP professional should address this by:

Advising the nurse to submit concerns anonymously only
Taking no action since culture change is outside the IP scope
Advocating for a psychologically safe reporting culture and formal channels such as safety hotlines or event reporting systems (Correct answer)
Telling the nurse that their concern is unfounded

Correct answer: Advocating for a psychologically safe reporting culture and formal channels such as safety hotlines or event reporting systems

Psychological safety is foundational to a strong safety culture; the IP professional should advocate for formal, protected reporting mechanisms and leadership accountability for non-retaliation.

Question 6: During an outbreak investigation, information collected in the line list reveals that all cases worked the night shift. This finding most directly suggests:

The pathogen has a 12-hour incubation period
A time-place association that may indicate a common exposure on the night shift (Correct answer)
The outbreak is due to a waterborne pathogen
Night-shift workers have lower vaccination rates

Correct answer: A time-place association that may indicate a common exposure on the night shift

A clustering of cases by work shift suggests a common exposure associated with the night shift environment, schedule, or shared equipment.

Question 7: Procalcitonin (PCT) guidance in antimicrobial stewardship is primarily used to:

Identify the specific causative pathogen
Select the appropriate antibiotic class
Determine the correct antibiotic dose
Guide antibiotic discontinuation in respiratory infections (Correct answer)

Correct answer: Guide antibiotic discontinuation in respiratory infections

PCT is a biomarker that rises with bacterial infections and falls as they resolve, making it useful for guiding safe discontinuation of antibiotics in respiratory tract infections.

Question 8: An IP wants to compare the mean number of hand hygiene opportunities missed per hour between nurses on the day shift and the night shift. Which statistical test would be most appropriate for this analysis?

Linear regression
Analysis of variance (ANOVA)
Chi-square test
Student's t-test (Correct answer)

Correct answer: Student's t-test

A Student's t-test is used to compare the means of a continuous variable (in this case, missed hand hygiene opportunities per hour) between two independent groups (day shift nurses and night shift nurses). A chi-square test is used for categorical data. ANOVA is used to compare the means of more than two groups. Linear regression is used to model the relationship between a dependent variable and one or more independent variables.

Question 9: When conducting a root cause analysis (RCA) of a healthcare-associated infection outbreak, what is the PRIMARY goal?

Identify system failures contributing to the outbreak (Correct answer)
Calculate financial liability for the facility
Determine which patient was the index case
Identify and discipline responsible staff

Correct answer: Identify system failures contributing to the outbreak

RCA is a systems-focused process designed to identify underlying system failures rather than assign individual blame.

Question 10: A German Shepherd that serves as a service animal for a crippled patient demands to be allowed to remain in the hospital room in order to help the patient. In conjunction with risk management, the appropriate response is to:

Give the sufferer alternate forms of support.
Tell the patient that they are not permitted to have an animal in the hospital.
Make plans to accommodate the animal. (Correct answer)
Encourage the nurses tending to the patient to take care of the animal as well.

Correct answer: Make plans to accommodate the animal.

Under the Americans with Disabilities Act (ADA), service animals are generally permitted in hospitals and other public places to assist individuals with disabilities. Hospitals must make reasonable accommodations for service animals unless their presence poses a direct threat or fundamental alteration to the facility's operations. Therefore, the appropriate response is to collaborate with risk management to develop a plan that safely accommodates the service animal while adhering to infection control guidelines.

Question 11: When developing infection prevention education for non-English-speaking healthcare workers, which adaptation is MOST important?

Translate materials using online translation tools
Provide a bilingual buddy system only
Deliver education in English with a glossary
Use pictorial job aids and translated materials reviewed by native speakers (Correct answer)

Correct answer: Use pictorial job aids and translated materials reviewed by native speakers

Pictorial aids combined with professionally reviewed translated materials address literacy and language barriers while ensuring content accuracy.

Question 12: What does the NHSN CAUTI definition specifically require regarding catheter presence?

Any urinary tract infection occurring in a hospitalized patient
A UTI accompanied by secondary bacteremia
An indwelling urinary catheter present for more than 2 calendar days before UTI symptom onset (Correct answer)
A UTI occurring in a patient with anatomical urological abnormalities

Correct answer: An indwelling urinary catheter present for more than 2 calendar days before UTI symptom onset

NHSN CAUTI criteria require the indwelling urinary catheter to have been in place for more than 2 calendar days on the date of the infection event.

Question 13: An IPC coordinator is developing the annual IPC budget. Which of the following should be given the highest priority when resources are limited?

Upgrading the break room in the IPC department
PPE stockpile and surveillance infrastructure to prevent HAIs (Correct answer)
Decorative signage updates for isolation rooms
Conference travel for IP staff professional development

Correct answer: PPE stockpile and surveillance infrastructure to prevent HAIs

PPE stockpiles and surveillance infrastructure directly protect patients and support the core mission of infection prevention, making them the highest priority in a constrained budget.

Question 14: A nursing unit reports 5 cases of influenza-like illness within 48 hours. What is the FIRST step the Infection Preventionist (IP) should take?

Notify the local public health department immediately.
Implement droplet precautions for all symptomatic patients.
Perform a literature review on influenza transmission.
Verify the diagnoses and establish a preliminary case definition. (Correct answer)

Correct answer: Verify the diagnoses and establish a preliminary case definition.

The foundational step in any outbreak investigation is to first confirm that the reported cases share a consistent diagnosis and to create a working case definition. This ensures the investigation is focused on a single, specific problem. Implementing control measures, conducting extensive reviews, or notifying health departments happens after this initial verification confirms an outbreak is likely.

Question 15: When creating a line list during the investigation of a healthcare-associated infection outbreak, which of the following data elements is MOST crucial for descriptive epidemiology?

Health insurance provider.
Date of symptom onset. (Correct answer)
Patient's home address.
Name of the attending physician.

Correct answer: Date of symptom onset.

A line list is a table containing key information on each case in an outbreak. The date of symptom onset is essential for the 'time' component of descriptive epidemiology (person, place, time), allowing the IP to create an epidemic curve and determine the outbreak's timeline. While other information is collected, the onset date is fundamental to the epidemiological investigation.

Question 16: The longest period of infusion that a parenteral lipid bag can run is as follows due to the higher risk of infection associated with parenteral nutrition:

Six hours. (Correct answer)
Twenty-four hours.
Eighteen hours.
Twelve hours.

Correct answer: Six hours.

Parenteral lipid emulsions are highly susceptible to microbial growth because they provide an excellent culture medium for bacteria. Limiting the infusion time to six hours significantly reduces the risk of bacterial proliferation within the solution. This strict time limit is a critical infection prevention measure to minimize the chance of bloodstream infections associated with parenteral nutrition, ensuring patient safety.

Question 17: Tuberculosis transmission most commonly occurs via which route?

Airborne transmission (Correct answer)
Vehicle transmission
Contact transmission
Droplet transmission

Correct answer: Airborne transmission

Mycobacterium tuberculosis is transmitted via airborne droplet nuclei (≤5 microns) that remain suspended in the air and can be inhaled by susceptible individuals.

Question 18: Vector-borne transmission of West Nile Virus occurs through which mechanism?

Mechanical transmission via mosquito bite
Biological transmission via mosquito bite (Correct answer)
Direct contact with infected birds
Fecal-oral transmission from bird droppings

Correct answer: Biological transmission via mosquito bite

West Nile Virus undergoes biological transmission, replicating within the mosquito vector before being injected into a new host during feeding.

Question 19: Which oral care practice is recommended for mechanically ventilated patients to prevent VAP?

No oral care is indicated for intubated patients
Chlorhexidine 0.12% oral rinse twice daily for cardiac surgery patients (Correct answer)
Plain water mouth rinse every four hours
Antibiotic-impregnated oral swab application

Correct answer: Chlorhexidine 0.12% oral rinse twice daily for cardiac surgery patients

Chlorhexidine 0.12% oral rinse is recommended for cardiac surgery ventilated patients to reduce oropharyngeal colonization and the risk of aspiration pneumonia.

Question 20: During a Legionella outbreak investigation in a hospital, which environmental source should be prioritized for sampling?

Carpet and floor surfaces in patient rooms
Potable water system and cooling towers (Correct answer)
Ice machines on patient floors
HVAC air filters

Correct answer: Potable water system and cooling towers

Legionella thrives in water systems; potable water and cooling towers are the primary environmental sources to sample in a healthcare outbreak.

Question 21: A unit-level outbreak investigation reveals that three nurses cared for all cases but no other cases occurred among patients of other nurses. This finding most strongly suggests:

The pathogen is highly virulent and affects all exposed patients equally
Healthcare worker carriage or technique as a potential transmission source (Correct answer)
A surveillance artifact due to selective testing by those nurses
Environmental contamination limited to those nurses' assigned rooms

Correct answer: Healthcare worker carriage or technique as a potential transmission source

When cases cluster around specific healthcare workers, it raises the hypothesis of HCW carriage or technique-related transmission as a contributing factor.

Question 22: Which component is part of the ABCDE bundle used to reduce ventilator days and VAP incidence?

Spontaneous Awakening and Breathing trials (Correct answer)
Routine daily blood cultures from all lines
Daily prophylactic antibiotic administration
Chest physiotherapy performed every four hours

Correct answer: Spontaneous Awakening and Breathing trials

The ABCDE bundle includes daily Spontaneous Awakening Trials and Spontaneous Breathing Trials to minimize sedation and ventilator time, reducing VAP risk.

Question 23: Which ventilation parameter is most critical for maintaining negative pressure in an airborne infection isolation room (AIIR)?

Equal supply and exhaust air volumes
Exhaust air volume exceeding supply air volume (Correct answer)
Recirculated air exceeding fresh air intake
Supply air volume exceeding exhaust air volume

Correct answer: Exhaust air volume exceeding supply air volume

Negative pressure rooms require exhaust airflow to exceed supply airflow so contaminated air flows inward rather than escaping to hallways.

Question 24: A patient with suspected pulmonary tuberculosis is admitted to an acute care hospital. Which of the following combinations of precautions is MOST appropriate to prevent the transmission of this infectious agent?

Droplet Precautions, including placing the patient in a private room.
Standard Precautions alone, as the diagnosis is not yet confirmed.
Contact Precautions and a standard surgical mask for the healthcare provider.
Airborne Precautions, including the use of an N95 respirator and placement in an airborne infection isolation room (AIIR). (Correct answer)

Correct answer: Airborne Precautions, including the use of an N95 respirator and placement in an airborne infection isolation room (AIIR).

Tuberculosis is transmitted via the airborne route, through small droplet nuclei that can remain suspended in the air for extended periods. Therefore, Airborne Precautions are required. This includes placing the patient in an airborne infection isolation room (AIIR), which is a negative pressure room, and requiring healthcare personnel to wear a fit-tested N95 or higher-level respirator.

Question 25: A surgical instrument set is found to contain a used instrument that was mistakenly included in a sterile wrapped tray. What is the most appropriate action?

Document the error and continue the procedure using that instrument
Wipe the instrument with an alcohol swab and proceed
Remove the used instrument and use the remaining instruments
Consider the entire tray contaminated and return it for reprocessing (Correct answer)

Correct answer: Consider the entire tray contaminated and return it for reprocessing

Sterility is package-based; any breach of tray integrity — including inclusion of a used item — renders the entire tray non-sterile and requires reprocessing.

Question 26: Which term describes a healthcare worker who has a positive TST or IGRA result but no symptoms, normal chest X-ray, and no evidence of active tuberculosis disease?

Tuberculosis converter
Active tuberculosis case
Suspected tuberculosis
Latent tuberculosis infection (LTBI) (Correct answer)

Correct answer: Latent tuberculosis infection (LTBI)

Latent TB infection is defined by immune sensitization to M. tuberculosis without clinical, bacteriological, or radiographic evidence of active disease.

Question 27: A healthcare facility wants to reduce musculoskeletal injuries from patient handling. Which strategy is MOST aligned with a safe patient handling program?

Training staff in manual lifting technique only
Purchasing ceiling-mounted mechanical lift equipment (Correct answer)
Limiting the weight of patients admitted to the facility
Requiring patients to assist regardless of mobility status

Correct answer: Purchasing ceiling-mounted mechanical lift equipment

Ceiling-mounted mechanical lift equipment eliminates manual lifting, which is the most effective engineering control to prevent musculoskeletal injuries in patient handling.

Question 28: What is the primary goal of an infection prevention risk assessment conducted annually by a healthcare facility?

To evaluate individual healthcare worker compliance with hand hygiene
To satisfy Joint Commission accreditation requirements only
To establish benchmarks against national NHSN rates
To identify the facility's unique infection risks and prioritize prevention strategies (Correct answer)

Correct answer: To identify the facility's unique infection risks and prioritize prevention strategies

An annual infection prevention risk assessment identifies the specific risks of a facility based on its patient population, geography, and services so that prevention resources are targeted appropriately.

Question 29: A hospital employee develops varicella (chickenpox). Which colleagues should be prioritized for post-exposure evaluation?

Staff working on the same floor during the infectious period
Susceptible staff who had face-to-face contact within 3 feet for ≥5 minutes (Correct answer)
Only staff who touched the employee's lesions
All staff who shared a break room with the employee

Correct answer: Susceptible staff who had face-to-face contact within 3 feet for ≥5 minutes

Varicella spreads via airborne and droplet routes, so close contact (≥5 minutes within 3 feet) defines exposed susceptible individuals who need evaluation.

Question 30: When a hospital employee is found to have active pulmonary tuberculosis, the IP professional's communication priority is to:

Wait for laboratory confirmation before any notification
Post a general notice in all hospital break rooms immediately
Inform all patients in the hospital about potential exposure
Notify occupational health, human resources, and public health, then conduct a confidential contact investigation (Correct answer)

Correct answer: Notify occupational health, human resources, and public health, then conduct a confidential contact investigation

Immediate confidential notification to occupational health, HR, and public health allows for a systematic contact investigation while protecting employee privacy under HIPAA.

Question 31: Which action should be taken when a wet pack is discovered after steam sterilization?

Rewrap and re-sterilize without cleaning
Allow it to air-dry on a clean surface and use immediately
Consider the pack non-sterile and reprocess it (Correct answer)
Document and consider it sterile if the external indicator changed

Correct answer: Consider the pack non-sterile and reprocess it

Wet packs are considered compromised because moisture can allow microbial wicking through packaging materials, rendering the contents non-sterile.

Question 32: Which of the following scenarios describes vector-borne transmission of an infectious agent?

A person develops Lyme disease after being bitten by an infected tick. (Correct answer)
A child contracts norovirus after touching a contaminated toy.
A patient develops a surgical site infection from contaminated instruments.
A nurse contracts hepatitis B from a needlestick injury.

Correct answer: A person develops Lyme disease after being bitten by an infected tick.

Vector-borne transmission involves the transfer of an infectious agent by a living organism, such as an insect or animal. Lyme disease is a classic example, transmitted to humans through the bite of an infected tick. The other options describe bloodborne, common vehicle (fomite), and indirect contact transmission, respectively.

Question 33: When a new IP professional joins a hospital, they should first review which document to understand the scope and authority of the IPC program?

The IPC program plan or IPC committee charter (Correct answer)
The hospital's marketing and communications plan
The employee handbook for HR policies
The most recent financial audit report

Correct answer: The IPC program plan or IPC committee charter

The IPC program plan or committee charter defines the program's goals, scope, authority, reporting structure, and accountability, providing the foundational framework for the IP professional's role.

Question 34: A hospital implements a respiratory protection program. Who is responsible for ensuring that the written program is in place, respirators are selected appropriately, and fit testing is conducted?

The employer (hospital administration) (Correct answer)
The equipment vendor
The employee using the respirator
The unit nurse manager

Correct answer: The employer (hospital administration)

OSHA places the ultimate responsibility for the respiratory protection program — including written plans, proper respirator selection, and fit testing — on the employer.

Question 35: An IP observes a conflict between a nurse and a physician regarding the proper use of personal protective equipment (PPE) for a patient on contact precautions. The nurse feels the physician is not following protocol, while the physician believes the nurse is being overly cautious. What is the most effective initial approach for the IP to manage this conflict?

Facilitate a private conversation with both parties, encouraging active listening and focusing on the shared goal of patient safety. (Correct answer)
Side with the physician to avoid undermining medical authority.
Report the nurse to their manager for questioning a physician's orders.
Immediately remove both individuals from the patient care area and mandate retraining.

Correct answer: Facilitate a private conversation with both parties, encouraging active listening and focusing on the shared goal of patient safety.

Effective conflict management involves bringing parties together to find a resolution. The best approach is to facilitate respectful communication, encourage active listening, and re-center the discussion on the common goal, which in healthcare is patient safety. This collaborative approach promotes a positive work environment and is more likely to lead to a sustainable solution than punitive or one-sided actions.

Question 36: A healthcare worker receives a needlestick injury from a patient known to be HIV-positive. According to current guidelines, post-exposure prophylaxis (PEP) should ideally be initiated within:

24 hours
1 hour
2 weeks
72 hours (Correct answer)

Correct answer: 72 hours

PEP is most effective when started within 2 hours but remains beneficial if initiated within 72 hours of exposure.

Question 37: During an outbreak of norovirus gastroenteritis on a hospital unit, which transmission route is primarily responsible for spread?

Fecal-oral route via contact with contaminated surfaces and hands (Correct answer)
Vector-borne transmission via insects
Airborne transmission via droplet nuclei
Bloodborne transmission via needlesticks

Correct answer: Fecal-oral route via contact with contaminated surfaces and hands

Norovirus spreads predominantly via the fecal-oral route through contaminated hands, surfaces, and food, requiring only a very low infectious dose (18–1000 viral particles).

Question 38: Which approach best describes 'two-step' cleaning and disinfection of an environmental surface?

Applying a combined cleaner-disinfectant product twice in succession
Applying disinfectant twice to the same surface without cleaning
Disinfecting and then rinsing with water to remove chemical residue
First removing visible soil with a detergent, then applying a disinfectant (Correct answer)

Correct answer: First removing visible soil with a detergent, then applying a disinfectant

Two-step disinfection involves first cleaning with a detergent to remove organic matter, then applying a disinfectant, because organic soil inactivates many disinfectants.

Question 39: An IP discovers that CAUTI rates are much higher in the medical ICU than the surgical ICU. After risk adjustment, the difference disappears. This suggests the initial difference was due to:

Measurement error in surgical ICU data
Selection bias in patient assignment
True higher risk in the medical ICU
Confounding by patient acuity or catheter duration (Correct answer)

Correct answer: Confounding by patient acuity or catheter duration

When rate differences disappear after risk adjustment, confounding variables (such as patient acuity or duration of catheterization) explain the apparent disparity.

Question 40: Which engineering control is MOST effective for reducing transmission of airborne infectious agents in an operating room?

Portable UV germicidal irradiation devices
Standard HVAC with 6 ACH
Negative pressure ventilation with HEPA filtration
Laminar airflow systems with positive pressure (Correct answer)

Correct answer: Laminar airflow systems with positive pressure

Operating rooms use positive pressure laminar airflow to push air outward and protect the sterile field from contamination entering from outside.

Question 41: Which statement correctly differentiates bactericidal from bacteriostatic antimicrobial activity?

Bacteriostatic agents inhibit bacterial replication; bactericidal agents kill bacteria directly (Correct answer)
Both terms refer to the same mechanism of action at different concentrations
Bacteriostatic agents are only used for gram-positive organisms
Bactericidal agents slow bacterial growth; bacteriostatic agents kill bacteria

Correct answer: Bacteriostatic agents inhibit bacterial replication; bactericidal agents kill bacteria directly

Bacteriostatic drugs inhibit bacterial growth and replication, relying on the host immune system to clear the infection, while bactericidal drugs directly kill bacteria.

Question 42: A foodborne outbreak affects guests at a wedding reception. Which investigative approach would best identify the implicated food item?

Genomic sequencing of all food samples
Cohort study with food-specific attack rates among attendees (Correct answer)
Environmental cultures of all kitchen surfaces
Case-control study comparing cases to non-attendees

Correct answer: Cohort study with food-specific attack rates among attendees

A cohort study calculating food-specific attack rates among all attendees is the most efficient method when the exposed population is well-defined and enumerable.

Question 43: An Infection Preventionist is investigating a potential foodborne illness outbreak following a staff potluck. Of the 75 employees who ate the potato salad, 15 developed symptoms of gastroenteritis. What is the attack rate for the potato salad?

75%
15%
20% (Correct answer)
25%

Correct answer: 20%

The attack rate is calculated by dividing the number of new cases of a disease by the number of people at risk for the disease, then multiplying by 100 to express it as a percentage. In this scenario, the calculation is (15 ill people / 75 people who ate the food) * 100 = 20%. [1, 3, 14]

Question 44: Which agency in the United States has primary responsibility for investigating multistate foodborne disease outbreaks?

United States Department of Agriculture (USDA)
Food and Drug Administration (FDA) only
State health departments in each affected state
Centers for Disease Control and Prevention (CDC) (Correct answer)

Correct answer: Centers for Disease Control and Prevention (CDC)

The CDC coordinates multistate foodborne outbreak investigations, working with state health departments, FDA, and USDA depending on the implicated food product.

Question 45: The IP professional is asked to conduct a root cause analysis (RCA) following a patient death linked to a CLABSI. The PRIMARY purpose of an RCA in this context is to:

Satisfy The Joint Commission reporting requirement
Assign blame to the responsible clinical staff
Document the event for potential litigation defense
Identify system-level factors that contributed to the event to prevent recurrence (Correct answer)

Correct answer: Identify system-level factors that contributed to the event to prevent recurrence

The primary purpose of an RCA is to identify underlying system failures and contributing factors, not individual blame, in order to implement corrective actions and prevent future events.

Question 46: Which component of the chain of infection refers to the reservoir's ability to exit and reach a susceptible host?

Portal of exit (Correct answer)
Portal of entry
Mode of transmission
Infectious dose

Correct answer: Portal of exit

The portal of exit is the pathway by which a pathogen leaves its reservoir to be transmitted to a new host.

Question 47: An employee health nurse is reviewing vaccination records for new hires. Which vaccine is recommended for all healthcare personnel who lack evidence of immunity, regardless of prior vaccination history?

Meningococcal vaccine
Yellow fever vaccine
Typhoid vaccine
Varicella vaccine (Correct answer)

Correct answer: Varicella vaccine

ACIP and CDC recommend varicella vaccination for all healthcare personnel without documented immunity, as varicella poses patient and worker risk.

Question 48: Which of the following best describes the role of the ICP when the local health department assumes jurisdiction over an outbreak investigation?

The ICP collaborates by providing facility data, implementing control measures, and serving as the internal liaison (Correct answer)
The ICP independently continues a parallel investigation without sharing data
The ICP suspends all infection control activities pending health department guidance
The ICP's role ends and they defer entirely to the health department

Correct answer: The ICP collaborates by providing facility data, implementing control measures, and serving as the internal liaison

The ICP serves as the critical internal liaison, providing case and exposure data, implementing recommended controls, and coordinating between the facility and health department.

Question 49: Which concept describes the ability of a surveillance system to detect outbreaks or increases in infection rates in a timely manner?

Timeliness
Specificity
Sensitivity (Correct answer)
Representativeness

Correct answer: Sensitivity

In surveillance system evaluation, sensitivity refers to the system's ability to detect true cases and outbreaks that actually occur.

Question 50: A patient is placed on droplet precautions for pertussis. Which mask should the patient wear when transported through the hospital?

Powered air-purifying respirator
Surgical/procedure mask (Correct answer)
N95 respirator
No mask is required for the patient

Correct answer: Surgical/procedure mask

Patients on droplet precautions should wear a surgical mask when leaving their room to contain respiratory secretions during transport.

Question 51: Which educational strategy is MOST effective for changing deeply ingrained infection prevention behaviors among healthcare workers?

One-time mandatory lecture
Policy distribution via email
Multimodal education with ongoing feedback (Correct answer)
Annual competency written exam

Correct answer: Multimodal education with ongoing feedback

Multimodal education combined with ongoing performance feedback is the most effective strategy for sustained behavioral change.

Question 52: Which scenario represents an appropriate use of benchmarking in IPC?

Comparing CLABSI rates to NHSN national data to identify if performance is above or below the median (Correct answer)
Only comparing data internally from year to year without external references
Using a competitor hospital's internal unpublished data to set targets
Accepting that all benchmarks are irrelevant to local patient populations

Correct answer: Comparing CLABSI rates to NHSN national data to identify if performance is above or below the median

Comparing to NHSN national benchmarks is the standard method for contextualizing a facility's infection rates against validated external data.

Question 53: Under the OSHA Bloodborne Pathogens Standard, which of the following is a required component of an employer's Exposure Control Plan?

A mandate for all employees to receive the influenza vaccine annually.
The identification and use of safer medical devices and needleless systems. (Correct answer)
A policy requiring post-exposure prophylaxis for all sharps injuries, regardless of source patient status.
A requirement for N95 respirator fit-testing for all clinical staff.

Correct answer: The identification and use of safer medical devices and needleless systems.

The OSHA Bloodborne Pathogens Standard, as amended by the Needlestick Safety and Prevention Act, requires employers to establish an Exposure Control Plan. This plan must include the evaluation and implementation of safer medical devices, such as sharps with engineered sharps injury protections and needleless systems, to eliminate or minimize employee exposure.

Question 54: A hospital's antimicrobial stewardship program is evaluating its antibiotic consumption data. Which of the following metrics is most recommended for tracking and reporting because it reflects the number of patients exposed to an antibiotic, regardless of the dose administered?

Prescribed Daily Dose (PDD)
Defined Daily Dose (DDD)
Grams of antibiotic purchased
Days of Therapy (DOT) (Correct answer)

Correct answer: Days of Therapy (DOT)

Days of Therapy (DOT) is the preferred metric for measuring antibiotic use. It is defined as the number of days a patient receives a specific antibiotic, regardless of the dose. This makes it a more accurate reflection of patient exposure compared to the Defined Daily Dose (DDD), which is a standardized measure that may not reflect actual prescribed doses, especially in cases of renal dose adjustments or in pediatric populations.

Question 55: A healthcare worker is caring for a patient with confirmed influenza. According to CDC guidelines, Droplet Precautions should be implemented. This includes which of the following practices?

Keeping the door to the patient's room closed at all times.
Wearing an N95 respirator for all patient encounters.
Wearing a surgical mask when working within 3-6 feet of the patient. (Correct answer)
Placing the patient in a positive-pressure isolation room.

Correct answer: Wearing a surgical mask when working within 3-6 feet of the patient.

Droplet Precautions are for pathogens transmitted by respiratory droplets generated by coughing, sneezing, or talking. These droplets travel short distances (typically 3-6 feet). Therefore, wearing a surgical mask is required for close contact. An N95 respirator is for airborne pathogens, and a special air handling room like a negative-pressure AIIR (not positive-pressure) is for airborne precautions.

Question 56: Hepatitis B virus (HBV) transmission in healthcare settings is MOST efficiently prevented by:

Treating all patient blood as non-infectious
Requiring N95 respirators for all patient care
Vaccination of healthcare workers and use of standard precautions (Correct answer)
Placing all HBV-positive patients in contact isolation

Correct answer: Vaccination of healthcare workers and use of standard precautions

HBV vaccination provides the most effective protection, and standard precautions (treating all blood/body fluids as infectious) prevent occupational exposure.

Question 57: When is it appropriate to use droplet precautions in addition to standard precautions?

For patients with active pulmonary tuberculosis
For patients with MRSA wound infections
For patients with C. difficile diarrhea
For patients with influenza (Correct answer)

Correct answer: For patients with influenza

Influenza spreads via respiratory droplets (>5 microns), requiring droplet precautions including a surgical mask within 3 feet of the patient.

Question 58: Which disinfectant is the preferred choice for environmental surfaces contaminated with Clostridioides difficile spores?

Alcohol-based product (70% ethanol)
EPA-registered sodium hypochlorite (bleach) solution (Correct answer)
Phenolic disinfectant
Quaternary ammonium compound (quat)

Correct answer: EPA-registered sodium hypochlorite (bleach) solution

EPA-registered sodium hypochlorite (bleach) is sporicidal and is the recommended disinfectant for C. difficile-contaminated environmental surfaces.

Question 59: The Bowie-Dick test is used specifically to detect failures in which component of a prevacuum steam sterilizer?

Biological indicator validity
Air removal and steam penetration (Correct answer)
Temperature recording devices
Chamber pressure sensors

Correct answer: Air removal and steam penetration

The Bowie-Dick test detects air pockets and inadequate steam penetration in prevacuum (dynamic-air-removal) steam sterilizers.

Question 60: A healthcare worker who is pregnant reports that she has been assigned to care for patients on airborne precautions for measles. The BEST course of action is:

Administer MMR vaccine to the worker immediately
Reassign the worker if she is not immune to measles (Correct answer)
Require the worker to wear a PAPR for all patient contacts
Allow the worker to continue duties with double masking

Correct answer: Reassign the worker if she is not immune to measles

Pregnant workers who lack immunity to measles should be reassigned because MMR is a live vaccine contraindicated in pregnancy.

Question 61: What is the primary purpose of an occupational health pre-placement evaluation for a new healthcare worker?

To determine salary grade based on physical capabilities
To fulfill HIPAA documentation requirements
To screen exclusively for communicable diseases
To establish a health baseline, assess immunity, and identify risks that may require job modification (Correct answer)

Correct answer: To establish a health baseline, assess immunity, and identify risks that may require job modification

Pre-placement evaluations establish baselines for future comparisons, assess vaccination immunity status, and identify conditions requiring accommodations or restrictions.

Question 62: Which type of surgical incise drape provides antimicrobial benefit at the wound edge during procedures?

Sterile paper drapes
Standard woven cotton drapes
Plain transparent film drapes
Iodine-impregnated adhesive incise drapes (Correct answer)

Correct answer: Iodine-impregnated adhesive incise drapes

Iodine-impregnated adhesive drapes release antiseptic at the skin-wound interface throughout the procedure, reducing microbial contamination of the operative field.

Question 63: Which stewardship strategy involves reviewing antibiotic prescriptions after they are dispensed and providing recommendations to prescribers?

Prior authorization
Prospective audit and feedback (PAF) (Correct answer)
Formulary restriction
Antibiotic rotation

Correct answer: Prospective audit and feedback (PAF)

Prospective audit and feedback involves pharmacists or infectious disease physicians reviewing active antibiotic orders and providing real-time recommendations to prescribers without requiring prior approval.

Question 64: A confidence interval (CI) of 95% for an odds ratio of 2.1 (CI: 1.3–3.4) in an infection study indicates:

There is a 5% chance the intervention is harmful
The result is not statistically significant
The true odds ratio likely falls between 1.3 and 3.4 (Correct answer)
The study has a 95% power to detect an effect

Correct answer: The true odds ratio likely falls between 1.3 and 3.4

A 95% CI that excludes 1.0 indicates statistical significance, and the interval estimates the range within which the true odds ratio likely falls.

Question 65: Which metric is most commonly used to measure antibiotic consumption in antimicrobial stewardship programs?

Days of therapy (DOT) per 1,000 patient-days (Correct answer)
Length of stay per infection episode
Number of prescriptions per patient
Total drug cost per admission

Correct answer: Days of therapy (DOT) per 1,000 patient-days

Days of therapy (DOT) per 1,000 patient-days is the preferred standardized metric for tracking antibiotic consumption because it accounts for multiple agents and dose changes.

Question 66: When calculating a surgical site infection (SSI) rate, what is used as the denominator?

Total surgical procedures performed (Correct answer)
Total hospital admissions
Total patient days
Total operative hours

Correct answer: Total surgical procedures performed

SSI rates are calculated per 100 surgical procedures, making the number of procedures the correct denominator.

Question 67: Which of the following is the primary advantage of active surveillance over passive surveillance for healthcare-associated infections?

It is primarily used for tracking long-term endemic disease rates.
It is less resource-intensive and more cost-effective.
It relies on voluntary reporting from healthcare providers.
It is more likely to identify all cases and provide more accurate data. (Correct answer)

Correct answer: It is more likely to identify all cases and provide more accurate data.

Active surveillance, where trained personnel proactively search for cases using various data sources, is more comprehensive and tends to yield more accurate and complete data than passive surveillance, which relies on others to report cases. While more resource-intensive, active surveillance is less likely to miss cases. [16, 20, 29]

Question 68: Which scenario best illustrates indirect contact transmission of a pathogen?

A patient touching a contaminated bedside rail and then touching their eyes (Correct answer)
A patient shaking hands with a colonized visitor
A nurse coughing near a patient without a mask
Sharing the same ventilation system with an infectious patient

Correct answer: A patient touching a contaminated bedside rail and then touching their eyes

Indirect contact transmission occurs when a susceptible host contacts a contaminated intermediate object (fomite) rather than directly contacting an infected person.

Question 69: Which statement best describes the difference between disinfection and sterilization?

Disinfection and sterilization are interchangeable terms in the Spaulding system
Sterilization applies only to liquid-immersion processes
Sterilization destroys all microbial life including spores; disinfection reduces but may not eliminate spores (Correct answer)
Disinfection eliminates all microbial life including spores; sterilization does not

Correct answer: Sterilization destroys all microbial life including spores; disinfection reduces but may not eliminate spores

Sterilization destroys all forms of microbial life including bacterial spores, while disinfection reduces microbial load but typically does not reliably eliminate spores.

Question 70: Healthcare workers with which condition should generally be excluded from caring for severely immunocompromised patients?

Prior history of hepatitis A with full recovery
Remote history of chickenpox with documented immunity
Active herpes zoster (shingles) with uncovered, weeping lesions (Correct answer)
Positive IGRA with completed LTBI treatment

Correct answer: Active herpes zoster (shingles) with uncovered, weeping lesions

Active herpes zoster with open lesions poses a transmission risk to immunocompromised patients through direct contact.

Question 71: What is the primary function of a safety officer in a healthcare facility's Incident Command System (HICS) during an emergency?

Authorize patient transfers to other facilities
Coordinate supply and logistics
Manage media communications
Monitor and ensure safe operations for all responding personnel (Correct answer)

Correct answer: Monitor and ensure safe operations for all responding personnel

In HICS, the Safety Officer monitors all emergency operations to identify and mitigate hazards that could harm response personnel.

Question 72: Which patient care scenario requires the use of both contact AND airborne precautions simultaneously?

Active varicella-zoster (chickenpox) infection (Correct answer)
Clostridioides difficile infection
Influenza A infection
Methicillin-resistant Staphylococcus aureus (MRSA) wound infection

Correct answer: Active varicella-zoster (chickenpox) infection

Varicella-zoster (chickenpox) is transmitted by both the airborne route and direct contact with vesicle fluid, requiring combined airborne and contact precautions.

Question 73: Which patient population requires Protective (Reverse) Isolation rather than transmission-based precautions?

Patients with active Clostridioides difficile infection
Patients on mechanical ventilation
Severely immunocompromised patients (e.g., allogeneic HSCT recipients) (Correct answer)
Patients colonized with ESBL-producing organisms

Correct answer: Severely immunocompromised patients (e.g., allogeneic HSCT recipients)

Severely immunocompromised patients (e.g., post-allogeneic HSCT) require Protective Environment with positive-pressure rooms and HEPA filtration to guard against environmental fungi and bacteria.

Question 74: Which principle of adult learning (andragogy) is MOST important to apply when teaching experienced nurses about updated isolation protocols?

Adults prefer structured, curriculum-driven learning paths
Adults need external motivation to engage in learning
Adults learn best through lecture-based instruction
Adults bring prior experience that should be leveraged in learning (Correct answer)

Correct answer: Adults bring prior experience that should be leveraged in learning

Andragogy emphasizes that adult learners bring valuable experience that should be acknowledged and integrated into new learning.

Question 75: A post-discharge room disinfection audit reveals that the UV-C disinfection robot missed several surfaces. What is the most likely reason?

UV-C robots require 24 hours to recharge between uses
UV-C light is ineffective against common healthcare pathogens
Shadow areas obstructed by furniture or equipment blocked UV-C exposure (Correct answer)
The room humidity was too low for UV-C to be effective

Correct answer: Shadow areas obstructed by furniture or equipment blocked UV-C exposure

UV-C light travels in straight lines and cannot disinfect surfaces in shadows or behind furniture, making thorough manual pre-cleaning and optimal robot positioning critical.

Question 76: Which of the following is the BEST example of a work practice control to reduce bloodborne pathogen exposure?

Using a sharps container with a self-closing lid
Prohibiting recapping needles by a two-handed technique (Correct answer)
Installing needle-free IV connection systems
Wearing double gloves during venipuncture

Correct answer: Prohibiting recapping needles by a two-handed technique

Prohibiting two-handed recapping is a work practice control — it changes the behavior itself — whereas safety devices are engineering controls.

Question 77: When a healthcare worker experiences a blood/body fluid exposure, which element is essential in the written exposure control plan per OSHA's Bloodborne Pathogens Standard?

Daily inspection logs for sharps containers
Engineering and work practice controls to eliminate or minimize exposure (Correct answer)
Employee vaccination records stored on-site permanently
A list of all employees by name who may have exposures

Correct answer: Engineering and work practice controls to eliminate or minimize exposure

OSHA requires the exposure control plan to identify engineering controls, work practice controls, and PPE used to minimize employee exposure risk.

Question 78: Event-related sterility is based on the principle that:

Items must be resterilized every 6 months regardless of packaging
Biological indicators must be run monthly to confirm sterility
Sterility is guaranteed for a fixed number of years
Packaging integrity, not time, determines sterility maintenance (Correct answer)

Correct answer: Packaging integrity, not time, determines sterility maintenance

Event-related sterility holds that sterile items remain sterile until an event (e.g., breach in packaging, moisture, or damage) compromises the barrier.

Question 79: Which scenario represents vertical transmission of an infectious agent?

HIV transmission from a mother to her infant during delivery (Correct answer)
A food handler spreads norovirus to restaurant patrons
Influenza spreading between hospital roommates
Malaria transmission via mosquito bite

Correct answer: HIV transmission from a mother to her infant during delivery

Vertical transmission refers to pathogen transfer from parent to offspring, including transplacental, perinatal (during delivery), or breastfeeding transmission.

Question 80: Which antibiotic class is most strongly associated with the development of Clostridioides difficile infection (CDI)?

Fluoroquinolones, clindamycin, and cephalosporins (Correct answer)
Nitrofurantoin
Macrolides
Metronidazole

Correct answer: Fluoroquinolones, clindamycin, and cephalosporins

Fluoroquinolones, clindamycin, and cephalosporins are most strongly linked to CDI because they disrupt gut flora and create an environment permissive for C. difficile colonization and toxin production.

Question 81: Stratified infection rate data, such as CLABSI rates separated by ICU type, is important in IPC reporting because it:

Eliminates the need to share raw infection counts with leadership
Allows meaningful comparison by controlling for differences in patient risk and device use across units (Correct answer)
Is required only for Magnet hospital designation
Simplifies data by combining all units into one aggregate number

Correct answer: Allows meaningful comparison by controlling for differences in patient risk and device use across units

Stratification controls for case-mix and device use differences between units, making comparisons more valid and helping identify where targeted improvements are needed.

Question 82: Which epidemiologic measure compares disease frequency between an exposed and unexposed group in a cohort study?

Attributable risk percent
Odds ratio
Number needed to treat
Relative risk (risk ratio) (Correct answer)

Correct answer: Relative risk (risk ratio)

Relative risk (risk ratio) directly compares incidence between exposed and unexposed groups in prospective cohort studies.

Question 83: An infection preventionist submits a quality improvement project abstract to a professional conference. Before submission, IRB review is typically NOT required when:

The QI project is not intended to generate generalizable knowledge (Correct answer)
The project uses identifiable patient data
The project involves patient interviews
The project compares two patient groups

Correct answer: The QI project is not intended to generate generalizable knowledge

Quality improvement projects not designed to generate generalizable new knowledge are typically exempt from IRB review, unlike research studies.

Question 84: A healthcare facility identifies that housekeeping staff are not cleaning the underside of patient bed frames. What surveillance method would most objectively identify this gap?

Fluorescent marker or ATP bioluminescence monitoring of targeted surfaces (Correct answer)
Direct observation of housekeeping staff during room cleaning
Reviewing housekeeping supply usage logs monthly
Patient satisfaction surveys regarding room cleanliness

Correct answer: Fluorescent marker or ATP bioluminescence monitoring of targeted surfaces

Fluorescent marker or ATP bioluminescence monitoring provides objective, measurable evidence of cleaning thoroughness on specific surfaces without relying solely on direct observation.

Question 85: A healthcare worker is exposed to a patient's blood through a needlestick. Which bloodborne pathogen has the highest risk of transmission per exposure event?

HIV
Hepatitis B virus (HBV) (Correct answer)
Hepatitis C virus (HCV)
Human T-lymphotropic virus (HTLV)

Correct answer: Hepatitis B virus (HBV)

HBV has the highest transmission risk per needlestick exposure (6–30%) compared to HCV (~1.8%) and HIV (~0.3%) in unvaccinated individuals.

Question 86: During a public health emergency, which communication principle is most important for maintaining staff trust and compliance with IPC directives?

Communicating only after all facts are confirmed
Providing transparent, timely, and consistent updates even when information is incomplete (Correct answer)
Delivering only positive news to prevent panic
Limiting communication to written memos to create a paper trail

Correct answer: Providing transparent, timely, and consistent updates even when information is incomplete

Transparent, timely, and consistent communication—even acknowledging uncertainty—builds trust during emergencies and supports staff compliance with evolving protocols.

Question 87: What is the primary goal of antimicrobial cycling (rotation) strategies?

Simplify prescribing decisions
Decrease the number of available antibiotics on formulary
Prevent the emergence and spread of resistance by rotating drug classes (Correct answer)
Reduce antibiotic costs

Correct answer: Prevent the emergence and spread of resistance by rotating drug classes

Antimicrobial cycling rotates antibiotic classes in a scheduled manner to reduce selective pressure from any single agent and theoretically limit resistance development.

Question 88: When developing an educational program for healthcare workers about a new isolation precaution, which of the following actions is most critical for the Infection Preventionist to perform first?

Assess the target audience's existing knowledge and learning needs.
Create visually appealing posters and handouts.
Book the largest conference room available for the training session.
Develop a post-test to measure knowledge acquisition. (Correct answer)

Correct answer: Develop a post-test to measure knowledge acquisition.

Effective education begins with an assessment of the learners' needs. Before developing content or materials, the IP must understand what the healthcare workers already know, what their potential barriers to learning are, and what specific information they require to perform their jobs safely. This allows for targeted, relevant, and effective educational content.

Question 89: A nurse recaps a used needle using the one-hand scoop technique. Which statement BEST describes this practice?

It is prohibited under all circumstances
It is an acceptable safer practice compared to two-hand recapping (Correct answer)
It is only acceptable with safety-engineered needles
It is recommended only in procedural areas

Correct answer: It is an acceptable safer practice compared to two-hand recapping

One-hand scooping is an accepted safer recapping technique when recapping is absolutely necessary, reducing needlestick risk compared to two-hand methods.

Question 90: An Infection Preventionist is educating staff on the chain of infection. Which of the following is considered a 'portal of entry'?

A break in the skin (Correct answer)
A person with a weakened immune system
A contaminated needle
Coughing or sneezing

Correct answer: A break in the skin

A portal of entry is the path by which a pathogen enters a susceptible host. A break in the skin, mucous membranes, the respiratory tract, and the gastrointestinal tract are all common portals of entry. A contaminated needle is a mode of transmission (fomite), a person with a weakened immune system is a susceptible host, and coughing/sneezing represents a portal of exit.

Question 91: Which pathogen most commonly requires Droplet Precautions in addition to Standard Precautions?

MRSA (wound)
Influenza virus (Correct answer)
Clostridium difficile
Mycobacterium tuberculosis

Correct answer: Influenza virus

Influenza spreads primarily via large respiratory droplets (>5 µm) and requires Droplet Precautions with a surgical mask within 3 feet.

Question 92: Which component of the innate immune system provides the first line of defense against invading pathogens?

Memory T cells from prior exposure
B lymphocytes producing antibodies
Cytotoxic T lymphocytes
Physical barriers such as intact skin and mucous membranes (Correct answer)

Correct answer: Physical barriers such as intact skin and mucous membranes

Physical and chemical barriers—including intact skin, mucous membranes, and secretions—constitute the body's first line of innate immune defense.

Question 93: An unvaccinated nurse sustains a needlestick injury from a hollow-bore needle used on a source patient who is known to be HBsAg-positive (chronic Hepatitis B infection). The nurse has not previously received the Hepatitis B vaccine. What is the most critical immediate post-exposure management step?

Draw blood for baseline serology and await results before treatment.
Administer both HBIG and the first dose of the Hepatitis B vaccine. (Correct answer)
Administer Hepatitis B Immune Globulin (HBIG) only.
Administer the first dose of the Hepatitis B vaccine only.

Correct answer: Administer both HBIG and the first dose of the Hepatitis B vaccine.

For an unvaccinated person exposed to a known HBsAg-positive source, post-exposure prophylaxis should include both Hepatitis B Immune Globulin (HBIG) for immediate passive immunity and the first dose of the Hepatitis B vaccine series for long-term active immunity. These should be administered as soon as possible, preferably within 24 hours.

Question 94: To interrupt the transmission of pathogens, the 'portal of entry' in the chain of infection must be protected. Which of the following is a key strategy for protecting this link?

Performing meticulous wound care and maintaining intact skin. (Correct answer)
Diagnosing and identifying the infectious agent accurately.
Ensuring proper hand hygiene before and after patient contact.
Promptly treating an infected patient with antimicrobials.

Correct answer: Performing meticulous wound care and maintaining intact skin.

The portal of entry is the path by which a pathogen enters a new host. Portals can include mucous membranes, non-intact skin (like wounds or surgical incisions), and the respiratory tract. Performing proper wound care and maintaining the integrity of a patient's skin directly protects a common portal of entry. While other options are important infection control measures, they address different links in the chain (infectious agent, mode of transmission, and infectious agent identification).

Question 95: What is the primary purpose of a 'protective environment' (PE) room in infection prevention?

Protect a severely immunocompromised patient from external environmental pathogens (Correct answer)
Isolate patients with multi-drug resistant organisms
Provide a safe space for infectious waste disposal
Prevent infectious aerosols from leaving the room

Correct answer: Protect a severely immunocompromised patient from external environmental pathogens

A protective environment uses positive pressure and HEPA filtration to protect severely immunocompromised patients from exogenous airborne pathogens, particularly fungi.

Question 96: Which surgical site infection (SSI) prevention measure is recommended for patients undergoing elective colorectal surgery?

Skin preparation with alcohol-based chlorhexidine gluconate (Correct answer)
Maintaining normothermia only during wound closure
Hair removal with a razor the morning of surgery
Routine bowel preparation with oral antibiotics alone

Correct answer: Skin preparation with alcohol-based chlorhexidine gluconate

Alcohol-based chlorhexidine gluconate is the preferred skin antiseptic agent for SSI prevention because it has superior residual activity compared to povidone-iodine alone.

Question 97: An ICP notes that a unit has had 5 MRSA infections in the past month compared to a baseline of 1 per month. What is the FIRST action?

Immediately implement contact precautions on all patients
Notify infection control committee and close the unit
Confirm case definitions and review whether cases meet healthcare-associated criteria (Correct answer)
Order point prevalence surveillance cultures on all patients

Correct answer: Confirm case definitions and review whether cases meet healthcare-associated criteria

Before declaring an outbreak, the ICP must first confirm case definitions and verify that cases are true healthcare-associated infections to avoid pseudo-outbreaks.

Question 98: An infection preventionist is concerned about sink drain biofilm as a source of multidrug-resistant gram-negative organisms (MDROs) in a critical care unit. Which measure is most appropriate?

Replacing all sinks with touchless models
Performing periodic drain disinfection and investigating patient-to-sink proximity as a risk factor (Correct answer)
Eliminating hand washing sinks and replacing with alcohol-based hand rub dispensers only
Pouring bleach down all drains daily as standard practice

Correct answer: Performing periodic drain disinfection and investigating patient-to-sink proximity as a risk factor

Sink drains harbor biofilm and MDROs that can splash onto surfaces and hands; periodic disinfection and assessing sink proximity to high-risk procedures are evidence-based interventions.

Question 99: What is the Surgical Care Improvement Project (SCIP) target for perioperative blood glucose in cardiac surgery patients?

Less than 200 mg/dL in the 18–24 hours postoperatively (Correct answer)
Less than 250 mg/dL at any point postoperatively
Less than 180 mg/dL at the time of incision only
Less than 150 mg/dL throughout the hospital stay

Correct answer: Less than 200 mg/dL in the 18–24 hours postoperatively

SCIP guidelines specify maintaining blood glucose below 200 mg/dL in the 18–24 hours following cardiac surgery to reduce SSI risk.

Question 100: Which leadership style is most effective for an IP professional implementing a new mandatory PPE protocol that meets resistance from clinical staff?

Laissez-faire, allowing staff to choose their own approach
Avoidant, waiting for staff to self-correct their behavior
Delegative, assigning PPE compliance to unit charge nurses only
Authoritative, clearly communicating the rationale and non-negotiable expectations (Correct answer)

Correct answer: Authoritative, clearly communicating the rationale and non-negotiable expectations

An authoritative style provides clear direction and explains the 'why,' which is effective when safety compliance is non-negotiable and staff buy-in is needed.

Question 101: When preparing a diluted bleach solution for disinfecting surfaces contaminated with C. difficile spores, the recommended concentration is:

1,000–5,000 ppm (1:50 to 1:10 dilution) (Correct answer)
500 ppm (1:100 dilution)
100 ppm (1:500 dilution)
10,000 ppm (undiluted)

Correct answer: 1,000–5,000 ppm (1:50 to 1:10 dilution)

EPA-registered bleach solutions at 1,000–5,000 ppm (approximately 1:10 dilution of household bleach) are required for C. difficile spore inactivation.

Question 102: A patient with end-stage renal disease on hemodialysis develops a fever and elevated white blood cell count. Their blunted immune response is best described as:

Normal age-related immune decline
Autoimmunity
Immunosuppression due to uremia (Correct answer)
Acquired immunodeficiency

Correct answer: Immunosuppression due to uremia

Uremia from renal failure causes immunosuppression by impairing neutrophil and lymphocyte function, increasing infection susceptibility.

Question 103: Which component of the chain of infection is broken by ensuring patients with influenza wear a surgical mask when being transported outside of their room?

Reservoir
Susceptible Host
Infectious Agent
Portal of Exit (Correct answer)

Correct answer: Portal of Exit

The chain of infection consists of six links: the infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host. By having a patient with influenza wear a mask, the intervention is controlling the dispersal of infectious droplets from the respiratory tract (the portal of exit), thereby breaking the chain at that point.

Question 104: A newly built bone marrow transplant unit is being commissioned. Which combination of ventilation parameters is required for the protective environment?

Positive pressure, HEPA filtration, minimum 12 ACH, no recirculation from other areas (Correct answer)
Positive pressure, MERV 14 filtration, minimum 6 ACH
Neutral pressure, MERV 14 filtration, minimum 10 ACH
Negative pressure, MERV 8 filtration, minimum 6 ACH

Correct answer: Positive pressure, HEPA filtration, minimum 12 ACH, no recirculation from other areas

CDC and ASHRAE 170 specify positive pressure, HEPA filtration (≥99.97%), and a minimum of 12 ACH with no recirculation from other areas for protective environment rooms serving severely immunocompromised patients.

Question 105: The fecal-oral route is the means by which hepatitis A is spread.

FALSE
TRUE (Correct answer)

Correct answer: TRUE

The fecal-oral channel is the method by which hepatitis A is spread, meaning that an infected person's feces can transfer the virus to another person's mouth.

Question 106: An IP creates an epidemic curve for an outbreak of norovirus on a rehabilitation unit. The curve shows a rapid increase in cases over 24-48 hours, followed by a gradual decline, with no clear evidence of wave-like patterns. What is the most likely mode of transmission suggested by this curve?

Point source (Correct answer)
Intermittent common source
Continuous common source
Propagated source (person-to-person)

Correct answer: Point source

A point source epidemic curve is characterized by a sharp upslope and a more gradual downslope, indicating that a group of people was exposed to a common infectious agent over a very brief period (e.g., a single contaminated meal or event). A propagated (person-to-person) source would show progressively taller peaks, a continuous common source would show a sustained plateau, and an intermittent source would have irregular peaks.

Question 107: A stewardship program tracks 'antibiotic-associated adverse events.' Which is the most common antibiotic-related harm that stewardship programs aim to prevent?

Hepatotoxicity
Nephrotoxicity from vancomycin
Anaphylaxis
Clostridioides difficile infection (Correct answer)

Correct answer: Clostridioides difficile infection

CDI is the most common antibiotic-related harm encountered in healthcare settings, with an estimated 500,000 cases and 30,000 deaths annually in the US, making its prevention a primary stewardship goal.

Question 108: Which of the following best defines a 'cluster' in epidemiological terms during an outbreak investigation?

Cases linked by molecular typing to a single source
Any group of healthcare-associated infections above the baseline rate
Three or more cases of any illness in a facility within 30 days
An aggregation of cases in a defined place and time that may or may not exceed the expected number (Correct answer)

Correct answer: An aggregation of cases in a defined place and time that may or may not exceed the expected number

A cluster is an aggregation of cases in a defined place and time that may or may not exceed the expected background rate and may or may not have a common cause.

Question 109: Which type of isolation precaution requires the use of a negative pressure room?

Protective environment precautions
Contact precautions
Airborne infection isolation precautions (Correct answer)
Droplet precautions

Correct answer: Airborne infection isolation precautions

Airborne infection isolation precautions require a negative pressure room to prevent airborne pathogens from escaping into surrounding areas.

Question 110: A healthcare worker is diagnosed with pertussis (whooping cough). The recommended work exclusion period after starting appropriate antibiotic treatment is:

Until completion of the full 5-day antibiotic course
14 days regardless of treatment
5 days after starting effective antibiotic therapy (Correct answer)
Until cough resolves completely

Correct answer: 5 days after starting effective antibiotic therapy

Healthcare workers with pertussis may return to work 5 days after initiating effective antimicrobial therapy, as they are considered non-infectious by that point.

Question 111: Which statistical test is most appropriate to determine if the difference in attack rates between exposed and unexposed groups is statistically significant?

ANOVA
Student's t-test
Pearson correlation coefficient
Chi-square test or Fisher's exact test (Correct answer)

Correct answer: Chi-square test or Fisher's exact test

Chi-square test (or Fisher's exact test for small cell counts) is used to compare proportions such as attack rates between two groups in outbreak investigations.

Question 112: What is the primary purpose of a negative-pressure isolation room?

Prevent outside air from entering the patient room
Exhaust room air to the outside, preventing airborne pathogens from escaping (Correct answer)
Maintain higher oxygen levels for immunocompromised patients
Reduce humidity to inhibit microbial growth

Correct answer: Exhaust room air to the outside, preventing airborne pathogens from escaping

Negative-pressure rooms exhaust air outward to prevent airborne infectious particles from spreading into corridors.

Question 113: When designing an infection prevention educational program for nursing staff, which learning theory best supports skill-based competency training?

Behaviorism (Correct answer)
Transformative learning
Cognitive theory
Constructivism

Correct answer: Behaviorism

Behaviorism focuses on observable, measurable behaviors and is best suited for skill-based competency training through demonstration and reinforcement.

Question 114: Which epidemiological term describes the proportion of individuals in a population who have a disease at a specific point in time?

Point prevalence (Correct answer)
Cumulative incidence
Attack rate
Incidence rate

Correct answer: Point prevalence

Point prevalence measures the proportion of a population affected by a disease at a single defined point in time.

Question 115: Which of the following is the BEST method for an Infection Preventionist to present monthly healthcare-associated infection (HAI) rate data to a multidisciplinary quality improvement committee to facilitate trend analysis and identify areas for intervention?

A detailed narrative report emailed to members before the meeting.
A verbal summary of the overall hospital infection rate during the meeting.
A static table listing the raw number of infections for each unit.
A series of run charts or control charts displaying rates over time for each HAI type. (Correct answer)

Correct answer: A series of run charts or control charts displaying rates over time for each HAI type.

Run charts and statistical process control (SPC) charts are powerful visual tools for presenting data over time. They allow stakeholders to easily identify trends, patterns, and shifts in performance, which is crucial for quality improvement. A narrative report or verbal summary lacks visual impact for trend analysis, and a static table of raw numbers does not provide rates or show performance over time, making it difficult to interpret context or identify meaningful change.

Question 116: An infection preventionist notes MRSA transmission persisting despite contact precautions. Which environmental factor should be investigated FIRST?

Air handling and HEPA filtration in patient rooms
Arthropod vectors in the facility
Water supply contamination with MRSA
Adequacy of terminal room cleaning and disinfection practices (Correct answer)

Correct answer: Adequacy of terminal room cleaning and disinfection practices

MRSA survives on environmental surfaces for extended periods; inadequate terminal cleaning is a common cause of ongoing contact transmission despite isolation precautions.

Question 117: Which of the following best defines 'colonization' in the context of infectious disease?

Pathogen eliminated by the host immune system
Pathogen present in blood causing systemic illness
Pathogen present without causing signs or symptoms of infection (Correct answer)
Pathogen present with host immune response and symptoms

Correct answer: Pathogen present without causing signs or symptoms of infection

Colonization means a microorganism is present and may be multiplying on or in a host without producing clinical signs or symptoms of infection.

Question 118: A patient develops fever, chills, and bacteremia 48 hours after a central line insertion. This represents which type of infection?

Community-acquired infection
Opportunistic infection
Healthcare-associated infection (Correct answer)
Endogenous infection

Correct answer: Healthcare-associated infection

An infection occurring more than 48 hours after admission that was not present on admission is classified as a healthcare-associated infection (HAI).

Question 119: A point-source outbreak epidemic curve typically displays which shape?

Gradual rise over weeks with a prolonged tail
Multiple peaks separated by the incubation period
A plateau lasting several months
A sharp rise and fall within one incubation period (Correct answer)

Correct answer: A sharp rise and fall within one incubation period

Point-source outbreaks show a sharp rise and fall within one incubation period because all cases are exposed simultaneously.

Question 120: Which statement correctly describes the difference between cleaning, disinfection, and sterilization in the healthcare environment?

Sterilization is required for all patient-contact surfaces in the environment of care
Disinfection and sterilization are interchangeable terms in the healthcare environment
Cleaning removes visible soil and reduces bioburden; disinfection kills most pathogens; sterilization eliminates all microbial life including spores (Correct answer)
Cleaning kills all microorganisms; disinfection removes visible soil; sterilization eliminates spores

Correct answer: Cleaning removes visible soil and reduces bioburden; disinfection kills most pathogens; sterilization eliminates all microbial life including spores

Cleaning removes physical soil and reduces bioburden; disinfection kills or inactivates most pathogens; sterilization achieves a sterility assurance level by eliminating all microbial life including spores.

Question 121: Which factor most directly determines whether a pathogen causes infection versus colonization in a host?

Temperature of the environment
Geographic origin of the pathogen
Balance between host immune defenses and pathogen virulence (Correct answer)
Duration of prior antibiotic therapy

Correct answer: Balance between host immune defenses and pathogen virulence

Whether disease occurs depends on the interplay between the virulence of the organism and the strength of the host's immune defenses.

Question 122: In a foodborne illness outbreak investigation, the vehicle of transmission is best identified using which epidemiologic tool?

Funnel plot
Attack rate table (Correct answer)
Epidemic curve
Control chart

Correct answer: Attack rate table

An attack rate table compares illness rates among those who ate each food item versus those who did not, identifying the likely vehicle.

Question 123: When designing a surveillance plan for a healthcare facility, which of the following is the most important initial step?

Hiring additional staff to manage data collection.
Conducting a risk assessment of the patient population and services provided. (Correct answer)
Establishing the format for the final report to leadership.
Selecting the software for data analysis.

Correct answer: Conducting a risk assessment of the patient population and services provided.

The design of a surveillance system should begin with a comprehensive risk assessment. This process involves evaluating the population served, the types of care and services provided, and analyzing existing data to identify the facility's specific risks for infection. The goals and objectives of the surveillance plan are then based on the findings of this assessment. [19, 21, 25]

Question 124: Which type of precautions should be implemented for a patient with confirmed influenza?

Standard precautions only
Airborne precautions
Contact precautions only
Droplet precautions (Correct answer)

Correct answer: Droplet precautions

Influenza is transmitted primarily via respiratory droplets (>5 microns), requiring droplet precautions including surgical mask and eye protection within 3 feet.

Question 125: Which practice is currently recommended to reduce SSI risk in colorectal surgery?

No bowel preparation before elective colorectal surgery
Oral antibiotics alone without mechanical preparation
Mechanical bowel preparation combined with oral antibiotics (Correct answer)
Mechanical bowel preparation alone without oral antibiotics

Correct answer: Mechanical bowel preparation combined with oral antibiotics

The combination of mechanical bowel preparation with oral antibiotics significantly reduces colorectal SSI rates compared to either method alone.

Question 126: An Infection Preventionist (IP) is reviewing the facility's Central Line-Associated Bloodstream Infection (CLABSI) data. The report shows a Standardized Infection Ratio (SIR) of 1.5 for the last quarter. How should the IP interpret this finding?

The number of observed infections was equal to the number of predicted infections.
The facility had 50% fewer infections than predicted.
The facility had 50% more infections than predicted. (Correct answer)
The facility's infection rate cannot be compared to the national baseline.

Correct answer: The facility had 50% more infections than predicted.

A Standardized Infection Ratio (SIR) greater than 1.0 indicates that more healthcare-associated infections (HAIs) were observed than were predicted based on a national baseline. An SIR of 1.5 means the facility observed 50% more infections than predicted. An SIR less than 1.0 would indicate fewer infections than predicted, and an SIR of 1.0 means the observed number matched the predicted number. [5, 8, 10]

Question 127: Environmental services staff should use an EPA-registered disinfectant with a label claim against which organism when cleaning a room after a patient on contact precautions for norovirus?

Methicillin-resistant Staphylococcus aureus
Mycobacterium tuberculosis
Norovirus (human norovirus surrogate) (Correct answer)
Clostridium difficile

Correct answer: Norovirus (human norovirus surrogate)

Norovirus requires an EPA-registered product with a specific label claim against norovirus or an approved surrogate such as feline calicivirus.

Question 128: An infection preventionist identifies a cluster of surgical site infections on a single unit over two weeks. What is the FIRST step in the outbreak investigation?

Implement contact precautions for all patients
Culture all healthcare workers on the unit
Notify the state health department immediately
Verify the diagnosis and confirm the cluster exists (Correct answer)

Correct answer: Verify the diagnosis and confirm the cluster exists

The first step in any outbreak investigation is to verify the diagnosis and confirm that a true cluster exists before taking further action.

Question 129: A facility is upgrading its HVAC system. Which filter efficiency rating is required for areas housing severely immunocompromised patients such as bone marrow transplant recipients?

MERV 6
MERV 14
MERV 17 (HEPA) (Correct answer)
MERV 8

Correct answer: MERV 17 (HEPA)

HEPA filters (MERV 17 or higher, 99.97% efficiency at 0.3 microns) are required for protective environment rooms serving severely immunocompromised patients.

Question 130: In the chain of infection, which element describes the portal through which a pathogen leaves the reservoir?

Portal of entry
Susceptible host
Portal of exit (Correct answer)
Mode of transmission

Correct answer: Portal of exit

The portal of exit is the path through which an infectious agent leaves its reservoir, such as the respiratory tract, GI tract, or skin.

Question 131: An employee sustains a splash of blood to the mucous membrane of their eye. After thorough irrigation, which information is MOST critical to obtain first?

The employee's most recent tuberculin skin test result
The volume of blood involved in the exposure
The source patient's bloodborne pathogen status (Correct answer)
The employee's hepatitis C antibody status

Correct answer: The source patient's bloodborne pathogen status

The source patient's serologic status for HIV, HBV, and HCV guides post-exposure management decisions.

Question 132: Which type of epidemiologic study design compares the frequency of an exposure between individuals with a disease and those without it?

Cohort study
Case-control study (Correct answer)
Randomized controlled trial
Cross-sectional study

Correct answer: Case-control study

Case-control studies compare exposures in cases (those with disease) versus controls (those without disease) to identify risk factors.

Question 133: A retrospective cohort study following surgical patients finds an odds ratio (OR) of 3.5 for SSI among diabetic patients. How should this be interpreted?

Diabetic patients are 3.5 times less likely to develop SSI
Diabetic patients are 3.5 times more likely to develop SSI (Correct answer)
Diabetic patients have a 3.5% absolute risk increase
SSI risk is the same in both groups

Correct answer: Diabetic patients are 3.5 times more likely to develop SSI

An OR of 3.5 means diabetic patients have 3.5 times greater odds of developing SSI compared to non-diabetic patients.

Question 134: Needlestick injuries are a common way for healthcare personnel to get Hepatitis B.

FALSE
TRUE (Correct answer)

Correct answer: TRUE

Healthcare professionals are more likely to get Hepatitis B because of the nature of their work, which frequently exposes them to bodily fluids like blood. In order to reduce the risk of contracting Hepatitis B and other bloodborne diseases, healthcare workers must adhere to strict safety protocols, such as using needle safety devices and practicing proper infection control measures. Needle-stick injuries, which occur when a healthcare worker accidentally punctures their skin with a contaminated needle, are a common mode of transmission for Hepatitis B.

Question 135: Under the RACE acronym used in fire safety, what does the letter 'C' stand for?

Check for victims
Contain the fire by closing doors (Correct answer)
Call the fire department
Clear the area of combustibles

Correct answer: Contain the fire by closing doors

In the RACE acronym (Rescue, Alarm, Contain, Extinguish/Evacuate), 'C' stands for Contain, which means closing doors and windows to slow the spread of fire.

Question 136: What is the purpose of risk-stratified SSI rates in infection prevention benchmarking?

Schedule operating room terminal cleaning intervals
Allow fair comparison of SSI rates across facilities with different patient populations (Correct answer)
Determine antibiotic resistance patterns at the facility level
Identify the specific causative organism in each SSI case

Correct answer: Allow fair comparison of SSI rates across facilities with different patient populations

Risk-stratified rates adjust for patient risk factors, enabling valid comparison of SSI rates between facilities that serve populations with differing health statuses.

Question 137: Which practice is recommended to prevent biofilm formation in endoscope channels between reprocessing steps?

Immersing endoscopes in low-level disinfectant
Soaking the endoscope in tap water
Flushing channels with air and alcohol immediately after each procedure (Correct answer)
Storing endoscopes in the original manufacturer shipping case

Correct answer: Flushing channels with air and alcohol immediately after each procedure

Immediate flushing of endoscope channels with air followed by 70% alcohol prevents biofilm formation and speeds drying before full reprocessing.

Question 138: Which precaution category is appropriate for a patient with measles (rubeola)?

Airborne precautions (Correct answer)
Droplet precautions only
Standard precautions only
Contact precautions only

Correct answer: Airborne precautions

Measles is transmitted via airborne droplet nuclei that can remain infectious in the air for up to 2 hours after an infected person leaves the room, requiring airborne precautions.

Question 139: When calculating an attack rate stratified by exposure status, what is the primary purpose of stratification?

To determine the incubation period
To establish the index case
To increase the sample size of the study
To identify confounding variables and effect modifiers (Correct answer)

Correct answer: To identify confounding variables and effect modifiers

Stratification helps identify confounders and effect modifiers by examining whether the exposure-disease association differs across subgroups.

Question 140: A newly hired CNA refuses the hepatitis B vaccine series offered by their employer. Under OSHA's Bloodborne Pathogens Standard, what must the employer do?

Prohibit the employee from patient care until vaccinated
Terminate the employee for non-compliance
Require the employee to complete an alternative immunization course
Have the employee sign a declination form (Correct answer)

Correct answer: Have the employee sign a declination form

OSHA requires that employees who decline the HBV vaccine sign a declination statement, acknowledging they were offered and refused the vaccine.

Question 141: Under OSHA's Bloodborne Pathogens Standard, how long must exposure incident records be retained?

Duration of employment only
5 years
10 years
30 years plus the duration of employment (Correct answer)

Correct answer: 30 years plus the duration of employment

OSHA requires that employee exposure records be maintained for 30 years plus the duration of employment.

Question 142: The minimum number of microorganisms required to establish infection in a susceptible host is called the:

Minimum inhibitory concentration
Inoculum threshold
Infectious dose (Correct answer)
Lethal dose

Correct answer: Infectious dose

The infectious dose (ID50) is the number of organisms required to cause infection in 50% of exposed susceptible hosts, and varies widely by pathogen.

Question 143: When conducting IPC staff education for non-clinical employees such as housekeeping staff, the most effective instructional approach is:

Verbal instructions given once during new employee orientation
Requiring online modules designed for clinical nurses
Using plain language, role-specific demonstrations, and return demonstrations (Correct answer)
Distributing detailed written policy manuals for self-study

Correct answer: Using plain language, role-specific demonstrations, and return demonstrations

Plain language, role-specific content, and return demonstrations ensure comprehension and competency for learners who may have varying literacy levels or English proficiency.

Question 144: A hospital observes a sudden increase in MRSA bacteremia. Whole-genome sequencing (WGS) reveals identical strains in all cases. What does this finding suggest?

Sporadic unrelated acquisitions
Laboratory cross-contamination only
Environmental contamination with multiple strains
A common-source or clonal outbreak (Correct answer)

Correct answer: A common-source or clonal outbreak

Identical WGS profiles indicate clonal transmission, suggesting a common source or person-to-person spread of a single strain.

Question 145: Which of the following is an example of a leading indicator in IPC performance measurement?

Hand hygiene compliance rate (Correct answer)
Ventilator-associated event rate
Monthly CLABSI rate
Number of catheter-associated UTIs per quarter

Correct answer: Hand hygiene compliance rate

Hand hygiene compliance is a leading indicator because it predicts future infection risk, whereas HAI rates are lagging indicators that reflect outcomes that have already occurred.

Question 146: A Sterile Processing Department (SPD) technician runs a steam sterilization load and discovers the biological indicator (BI) test is positive, indicating a potential sterilization failure. However, the chemical indicators on the packages passed. What is the MOST appropriate immediate action?

Immediately quarantine the entire load, retrieve any items that may have been prematurely released, and notify the IP and relevant departments. (Correct answer)
Rerun the same load through a new cycle and release the items if the second BI is negative.
Document the positive BI and take the sterilizer out of service for its next scheduled preventative maintenance.
Release the load for use, as the chemical indicators showed the sterilizer reached the correct temperature.

Correct answer: Immediately quarantine the entire load, retrieve any items that may have been prematurely released, and notify the IP and relevant departments.

A positive biological indicator signifies that the conditions for sterilization were not met to kill a high number of resistant bacterial spores, representing a failure of the cycle. The entire load is considered non-sterile and must be quarantined immediately. A recall of any distributed items is critical to prevent patient harm, and an investigation into the cause of the failure must be initiated.

Question 147: Which term describes a disease that is consistently present at a relatively stable baseline level in a defined geographic area or population?

Hyperendemic
Pandemic
Endemic (Correct answer)
Epidemic

Correct answer: Endemic

An endemic disease maintains a persistent, expected baseline level of occurrence within a specific geographic area without external importation.

Question 148: Which of the following is a core element of hospital antimicrobial stewardship programs according to CDC?

Mandatory antibiotic formulary elimination every 2 years
Requiring all antibiotic orders to be reviewed by administration
Limiting infectious disease consults to ICU patients only
Leadership commitment with dedicated human, financial, and IT resources (Correct answer)

Correct answer: Leadership commitment with dedicated human, financial, and IT resources

CDC identifies leadership commitment with dedicated resources as a foundational element, as sustainable stewardship requires institutional support, not just individual efforts.

Question 149: Which chemical class is classified as an intermediate-level disinfectant and is effective against Mycobacterium tuberculosis?

Hypochlorites at 10 ppm
70–90% isopropyl or ethyl alcohol (Correct answer)
Benzalkonium chloride
Quaternary ammonium compounds (quats)

Correct answer: 70–90% isopropyl or ethyl alcohol

Alcohols (70–90%) are intermediate-level disinfectants with tuberculocidal activity, making them appropriate for surfaces and non-critical equipment.

Question 150: A hospital observes an increase in gram-negative infections traced to shared equipment. Which practice most directly reduces this risk?

Implementing contact precautions for all gram-negative infected patients
Installing UV-C robots in all patient rooms nightly
Increasing antibiotic prophylaxis for high-risk patients
Dedicating or thoroughly disinfecting equipment between patients (Correct answer)

Correct answer: Dedicating or thoroughly disinfecting equipment between patients

Dedicating equipment to individual patients or rigorously disinfecting shared equipment between patients is the most direct way to interrupt gram-negative transmission via fomites.

Question 151: A healthcare facility is investigating a cluster of Aspergillus infections in an oncology unit. Construction is occurring two floors below. What is the most likely transmission route?

Airborne fungal spores migrating through the HVAC system or stairwells (Correct answer)
Contaminated water in ice machines on the unit
Contaminated parenteral nutrition solutions
Direct contact with infected construction workers

Correct answer: Airborne fungal spores migrating through the HVAC system or stairwells

Aspergillus spores are airborne and can travel long distances through HVAC systems or negative-pressure stairwells from remote construction sites to immunocompromised patient units.

Question 152: Which statistical process control chart is MOST appropriate for monitoring monthly CLABSI rates over time?

U-chart (or C-chart) (Correct answer)
Histogram
Scatter plot
Pareto chart

Correct answer: U-chart (or C-chart)

A U-chart (rate-based control chart) is used to monitor infection rates per device-day over time and detect special-cause variation.

CIC Certification in Infection Prevention and Control Exam

The CIC exam, administered by CBIC, certifies infection preventionists who demonstrate competency in surveillance, epidemiology, transmission prevention, and infection control practices across healthcare settings.

150

Questions

180 min

Time Limit

67%

To Pass

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These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

cbic.org — Retake policy, score release, score validity, test dates, time limit, test delivery, fees, exam format, late registration, passing score · verified Oct 2026
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