IAHCSMM Infection Prevention and Microbiology

Question 1

Which microorganism is used as the biological indicator challenge organism for steam sterilization?

Accepted Answer

Geobacillus stearothermophilus spores

Answer

Geobacillus stearothermophilus (formerly Bacillus stearothermophilus) spores are the standard biological indicator challenge organism for steam sterilization due to their exceptional heat resistance.

Question 2

The chain of infection model is important to CS professionals because:

Accepted Answer

It identifies transmission routes that proper instrument reprocessing interrupts, preventing healthcare-associated infections

Answer

Understanding the chain of infection helps CS professionals see how proper decontamination and sterilization interrupts pathogen transmission routes, preventing HAIs.

Question 3

Which cleaning agent is specifically formulated to break down protein-based soil (blood, tissue) and is most effective when used within its recommended temperature range?

Accepted Answer

Multi-enzyme detergent cleaners

Answer

Multi-enzyme detergents contain proteases, lipases, and amylases that chemically break down protein, fat, and carbohydrate-based soils on instruments, and are most effective at the temperature recommended by the manufacturer.

Question 4

Biofilm formation on inadequately cleaned medical instruments is dangerous because:

Accepted Answer

Biofilms protect embedded microorganisms from detergents, disinfectants, and sterilants, potentially surviving reprocessing

Answer

Biofilms consist of microorganisms embedded in a protective polysaccharide matrix that significantly increases resistance to cleaning agents, disinfectants, and even sterilants.

Question 5

Which type of hepatitis is most commonly associated with occupational exposure in CS workers handling contaminated sharps?

Accepted Answer

Hepatitis B

Answer

Hepatitis B virus (HBV) has historically been the primary bloodborne pathogen concern for healthcare workers, and OSHA requires employers to offer HBV vaccination to all workers with occupational exposure.

(IAHCSMM) International Association of Healthcare Central Service Material Manage Practice Test

(IAHCSMM) International Association of Healthcare Central Service Material Manage Practice Test

IAHCSMM Infection Prevention and Microbiology