Mixed Deck — All CIC Topics Flashcards

After investigating a cluster of Pseudomonas aeruginosa bloodstream infections in the ICU, the IP's descriptive epidemiology reveals that all affected patients had a central line and were located in the same wing of the unit. What is the most appropriate next step in the investigation?

Answer: Develop a hypothesis and conduct analytic studies, such as observing central line care practices.

Descriptive epidemiology (person, place, time) helps to generate hypotheses about the cause of an outbreak. The findings point toward a potential issue with central line care. The next logical step is to formulate a specific hypothesis (e.g., 'The outbreak is caused by a breach in aseptic technique') and then test it through analytic epidemiology, which could include a case-control study or direct observation of practices. Making conclusions or implementing widespread interventions without testing the hypothesis is premature.

An Infection Preventionist is advising the Environmental Services department on the terminal cleaning protocol for a room previously occupied by a patient with a confirmed *Clostridioides difficile* infection (CDI). Which instruction is most critical?

Answer: Clean and disinfect the room using an EPA-registered sporicidal agent.

*Clostridioides difficile* produces spores that are highly resistant to standard hospital disinfectants, such as quaternary ammonium compounds. Therefore, it is critical to use a disinfectant with sporicidal activity, as specified by the EPA (List K), to effectively decontaminate the environment and prevent transmission. While good ventilation and adjunct technologies like UV-C are important, they do not replace the fundamental need for manual cleaning with a sporicidal chemical agent.

According to CDC/WHO guidelines, what is the minimum recommended duration for alcohol-based hand rub application?

Answer: 20–30 seconds

Hand rub must be applied for 20–30 seconds until hands are dry to achieve adequate antimicrobial efficacy.

An Infection Preventionist (IP) is preparing to present quarterly hand hygiene compliance data to the hospital's senior leadership. To be most persuasive and gain support for a new improvement initiative, which communication strategy should the IP prioritize?

Answer: Telling a compelling story about a patient who was harmed by a healthcare-associated infection.

Storytelling is a powerful tool in strategic communication to enhance the impact of information. By connecting data to a real patient event, the IP can elicit emotion, highlight the impact of non-compliance, and create a more memorable and persuasive case for change than data alone. While data is important, framing it within a narrative makes it more relatable and compelling for leaders.

A biological indicator (BI) used in steam sterilization contains spores of which organism?

Answer: Geobacillus stearothermophilus

Geobacillus stearothermophilus spores are the standard biological indicator for steam sterilization because of their high heat resistance.

What is the recommended timing for surgical antimicrobial prophylaxis administration to reduce SSI risk?

Answer: Within 60 minutes before incision

Prophylactic antibiotics should be administered within 60 minutes before the surgical incision to achieve adequate tissue levels at the time of the procedure.

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

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).

During outbreak investigation, which step should occur BEFORE implementing control measures?

Answer: Verifying the diagnosis through laboratory confirmation

Verifying the diagnosis through laboratory confirmation is essential before implementing targeted control measures to ensure appropriate interventions are applied.

According to the CDC Healthcare Infection Control Practices Advisory Committee (HICPAC), what is the recommended minimum number of air changes per hour (ACH) for an airborne infection isolation room (AIIR)?

Answer: 12 ACH

HICPAC recommends a minimum of 12 ACH for AIIRs to adequately dilute and remove airborne infectious particles.

Which is the primary central line insertion bundle element for CLABSI prevention?

Answer: Maximal sterile barrier precautions during insertion

Maximal sterile barrier precautions—cap, mask, sterile gown, sterile gloves, and large sterile drape—during CVC insertion are a core evidence-based CLABSI bundle element.

Tuberculosis transmission most commonly occurs via which route?

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.

A nurse sustains a needlestick injury from a patient with unknown HIV status. The MOST important immediate action is:

Answer: Wash the wound thoroughly with soap and water

Immediate thorough washing of the wound with soap and water is the first step, reducing pathogen load before other interventions.

A patient with influenza sneezes, and another individual standing two feet away inhales the infectious particles. This represents which mode of transmission in the chain of infection?

Answer: Droplet transmission

Droplet transmission occurs when respiratory droplets carrying infectious pathogens are generated from a source person (e.g., through coughing or sneezing) and are propelled a short distance through the air and deposited on the mucous membranes of a nearby person. This is distinct from airborne transmission, where smaller droplet nuclei can remain suspended in the air for longer periods and travel longer distances.

Regarding biofilms, which are frequently seen in dental unit waterlines, which of the following statements is true?

Answer: In dental operatories, the dental team is responsible for keeping biofilm levels under 500 colony forming units.

When a dental unit is stagnant, bacteria and other microorganisms known as biofilms can form in the waterlines. These biofilms can be dangerous. Dental offices are mandated to maintain biofilm levels at less than 500 colony forming units (i.e., the unit of measurement used for this type of biofilm) in order to prevent infections. Biofilms can still be harmful and infectious even at these concentrations, especially in people with weakened immune systems. Because dental healthcare professionals often have good immune systems and are not exposed to biofilms, there is little chance of a serious infection or sickness.

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:

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.

The following are all instances of mechanical instrument cleaning, with the exception of:

Answer: glutaraldehyde solution.

When cleaning contaminated equipment mechanically, contact of some kind with the surface being scrubbed clean is implied. Holding solutions, often known as glutaraldehyde (""cold sterile"") solutions, function without making direct or abrasive contact with the surface. The only appropriate kind of apparatus for hand cleaning is a long-handled brush; nonetheless, because of the possibility of puncture injuries, this is the least preferred approach.

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

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.

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?

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.

A hospital's IPC committee has not met for six months. As the IP professional, the most appropriate first step is to:

Answer: Review the committee's charter and escalate the lapse to medical staff leadership

Reviewing the committee charter clarifies its mandate and reporting structure, and escalating the lapse to medical staff leadership is the appropriate channel to restore governance function.

A patient with vancomycin-resistant Enterococcus (VRE) bacteremia is admitted. What precaution level is appropriate?

Answer: Contact Precautions

VRE is transmitted by direct and indirect contact; Contact Precautions with gown and gloves are indicated to prevent environmental spread.