DHA Infection Control & Prevention 5

Question 1

Which of the following pathogens requires airborne precautions (negative pressure room + N95 respirator)?

Accepted Answer

Pulmonary tuberculosis

Answer

Pulmonary tuberculosis is transmitted via small airborne droplet nuclei that remain suspended in air, requiring airborne precautions and N95 respirators.

Question 2

The Spaulding classification categorizes medical devices to determine the level of disinfection or sterilization needed. Which category applies to a laryngoscope blade?

Accepted Answer

Semi-critical — requires high-level disinfection

Answer

Laryngoscope blades contact mucous membranes but do not penetrate sterile tissue, classifying them as semi-critical and requiring at minimum high-level disinfection.

Question 3

A multidrug-resistant organism (MDRO) outbreak is suspected on a ward. Which initial action is MOST appropriate by the infection control team?

Accepted Answer

Conduct a point prevalence survey and review microbiology data

Answer

Investigating an MDRO outbreak begins with a point prevalence survey and review of microbiology culture data to identify the scope and source.

Question 4

Which of the following correctly describes 'colonization' in infection control terminology?

Accepted Answer

Presence of a pathogen without causing clinical signs or symptoms

Answer

Colonization means a pathogen is present and multiplying on or in the host without causing clinical disease or an immune response.

Question 5

Healthcare-associated infections (HAIs) related to central venous catheters (CVCs) can be reduced by implementing a bundle approach. Which element is NOT part of the standard CVC insertion bundle?

Accepted Answer

Routine scheduled catheter changes every 72 hours

Answer

Evidence does not support routine scheduled CVC changes; catheters should be removed when no longer clinically necessary, not on a fixed schedule.

DHA - Dubai Health Authority Practice Test

DHA - Dubai Health Authority Practice Test

DHA Infection Control & Prevention 5