CBIC Multidrug-Resistant Organisms 2

Question 1

When implementing an MDRO prevention bundle, which intervention has the STRONGEST evidence for reducing MRSA transmission?

Accepted Answer

Contact precautions combined with hand hygiene compliance

Answer

The combination of contact precautions and high hand hygiene compliance has the strongest evidence base for reducing MRSA transmission in healthcare settings.

Question 2

Cohorting MDRO-positive patients is BEST defined as:

Accepted Answer

Grouping colonized or infected patients together and assigning dedicated staff

Answer

Cohorting involves grouping patients with the same MDRO together in designated areas and assigning dedicated nursing staff to prevent cross-transmission to MDRO-negative patients.

Question 3

Which of the following is a recognized independent risk factor for acquiring an MDRO in healthcare settings?

Accepted Answer

Prior exposure to antimicrobial agents

Answer

Prior antimicrobial exposure is a well-established independent risk factor for MDRO acquisition, as antibiotics can eliminate susceptible flora and allow resistant organisms to proliferate.

Question 4

The vanA gene in VRE confers resistance to vancomycin by:

Accepted Answer

Modifying the peptidoglycan target to reduce vancomycin binding

Answer

The vanA operon encodes enzymes that alter the terminal peptidoglycan precursor from D-Ala-D-Ala to D-Ala-D-Lac, dramatically reducing vancomycin's binding affinity.

Question 5

When a patient on contact precautions for MRSA requires transfer to another unit, the infection preventionist should ensure:

Accepted Answer

The receiving unit is notified before the transfer occurs

Answer

Communicating MDRO status to the receiving unit before transfer allows staff to prepare appropriate precautions, preventing a gap in infection control measures.

CBIC - Certification Board of Infection Control Practice Test

CBIC - Certification Board of Infection Control Practice Test

CBIC Multidrug-Resistant Organisms 2