MOH Infection Control & Hospital Epidemiology 2

Question 1

Which sterilization method is most appropriate for heat-sensitive medical devices such as flexible endoscopes?

Accepted Answer

Ethylene oxide (ETO) gas sterilization

Answer

Ethylene oxide sterilization operates at low temperatures (~55°C) and is therefore suitable for heat-sensitive instruments that would be damaged by steam or dry heat.

Question 2

According to the Spaulding classification, a device that contacts intact mucous membranes but does not penetrate sterile tissue is classified as:

Accepted Answer

Semi-critical

Answer

Semi-critical items (e.g., laryngoscope blades, respiratory therapy equipment) contact intact mucous membranes and require at minimum high-level disinfection.

Question 3

A patient colonized with MRSA (Methicillin-resistant Staphylococcus aureus) should be placed under which precautions?

Accepted Answer

Contact precautions with gloves and gown

Answer

MRSA spreads primarily through direct contact; contact precautions (gloves and gown) are required to prevent transmission to other patients and staff.

Question 4

The most important modifiable risk factor for catheter-associated urinary tract infections (CAUTI) is:

Accepted Answer

Prolonged duration of urinary catheter use

Answer

Prolonged catheterization is the strongest modifiable risk factor for CAUTI; daily review and prompt removal when no longer indicated is the key preventive strategy.

Question 5

Which intervention is most effective in preventing ventilator-associated pneumonia (VAP)?

Accepted Answer

Elevating the head of bed to 30–45 degrees

Answer

Semi-recumbent positioning (30–45° head elevation) reduces gastric reflux and microaspiration of oropharyngeal secretions into the lower respiratory tract, significantly lowering VAP rates.

MOH UAE Practice Test

MOH UAE Practice Test

MOH Infection Control & Hospital Epidemiology 2