Free MDRAO Microbiology and Infection Control Questions and Answers

Question 1

Which of the following microorganisms is the most resistant to sterilization processes?

Accepted Answer

Bacterial spores.

Answer

Bacterial spores are the dormant, highly resistant form of certain bacteria. Sterilization processes are specifically designed to be powerful enough to kill these spores, with the assurance that anything less resistant will also be destroyed.

Question 2

In the chain of infection, what is the role of a contaminated surgical instrument?

Accepted Answer

A mode of transmission (fomite).

Answer

A contaminated object, like a surgical instrument, is known as a fomite. It serves as the vehicle, or mode of transmission, that carries the infectious agent (e.g., bacteria) from a reservoir to a susceptible host, thus continuing the chain of infection.

Question 3

What is the primary purpose of cleaning medical devices prior to sterilization?

Accepted Answer

To remove soil and bioburden, which can shield microbes from the sterilant.

Answer

Cleaning is the critical first step in reprocessing to remove all visible soil and bioburden. If not removed, this organic and inorganic matter can shield microorganisms from the sterilant, preventing it from reaching the device surface and leading to sterilization failure.

Question 4

When working in the decontamination area, what is the minimum required Personal Protective Equipment (PPE)?

Accepted Answer

Fluid-resistant gown, gloves, face shield or goggles/mask, and shoe covers.

Answer

The decontamination area poses a high risk of exposure to pathogens through splashes and aerosols. Comprehensive PPE is required to protect the technician's skin, clothing, and mucous membranes. This includes a fluid-resistant gown, utility gloves, a full face shield (or goggles and mask), and fluid-resistant shoe covers.

Question 5

A semi-critical medical device, such as a flexible endoscope, requires what minimum level of reprocessing?

Accepted Answer

High-level disinfection.

Answer

Semi-critical devices are those that contact mucous membranes or non-intact skin. According to the Spaulding Classification, these items require, at a minimum, high-level disinfection (HLD) to eliminate all vegetative microorganisms, mycobacteria, fungi, and viruses.

MDRAO - Medical Device Reprocessing Association of Ontario Practice Test

MDRAO - Medical Device Reprocessing Association of Ontario Practice Test

Free MDRAO Microbiology and Infection Control Questions and Answers