CBIC CBIC Sterilization and Disinfection 3

Question 1

Which concentration of sodium hypochlorite (bleach) is recommended by the CDC for disinfecting surfaces contaminated with C. difficile spores?

Accepted Answer

0.5% (5,000 ppm)

Answer

The CDC recommends a 1:10 dilution of household bleach (approximately 5,000 ppm or 0.5%) for C. difficile spore-contaminated surfaces.

Question 2

Low-level disinfection is appropriate for which type of non-critical medical equipment?

Accepted Answer

Blood pressure cuffs and stethoscopes

Answer

Non-critical items like blood pressure cuffs and stethoscopes that contact only intact skin require only low-level disinfection.

Question 3

Which sterilization method uses hydrogen peroxide plasma and is suitable for moisture-sensitive devices?

Accepted Answer

STERRAD (hydrogen peroxide gas plasma)

Answer

STERRAD systems use low-temperature hydrogen peroxide gas plasma to sterilize moisture-sensitive and heat-sensitive devices.

Question 4

Which term describes the process of removing contamination from an item to make it safe for handling by unprotected personnel?

Accepted Answer

Decontamination

Answer

Decontamination is the process of reducing microbial contamination on an item to a level safe for handling without special precautions.

Question 5

What is the recommended contact time for most EPA-registered intermediate-level disinfectants on environmental surfaces?

Accepted Answer

Follow manufacturer's specified wet contact time

Answer

Disinfectants must remain wet on the surface for the manufacturer's specified contact (dwell) time to achieve their labeled efficacy.

CBIC - Certification Board of Infection Control Practice Test