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

Universal gowning and gloving of all staff

Answer

Routine environmental cultures of patient rooms

Answer

Weekly screening of all healthcare workers

Question 2

Cohorting MDRO-positive patients is BEST defined as:

Accepted Answer

Grouping colonized or infected patients together and assigning dedicated staff

Answer

Discharging patients with MDROs to long-term care facilities

Answer

Placing patients in negative pressure isolation rooms

Answer

Restricting MDRO-positive patients to their rooms at all times

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

Young age under 18

Answer

Female sex

Answer

Living in a rural area

Question 4

The vanA gene in VRE confers resistance to vancomycin by:

Accepted Answer

Modifying the peptidoglycan target to reduce vancomycin binding

Answer

Pumping vancomycin out of the bacterial cell

Answer

Producing an enzyme that degrades vancomycin

Answer

Reducing cell membrane permeability to vancomycin

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

The patient is bathed with chlorhexidine immediately prior to transfer

Answer

A negative surveillance culture is obtained before transfer

Answer

The patient wears a gown and mask during transport

Question 6

Which disinfectant class is MOST effective against VRE on environmental surfaces?

Accepted Answer

EPA-registered hospital disinfectants including bleach-based products

Answer

Quaternary ammonium compounds (QUATs) alone

Answer

Isopropyl alcohol 70%

Answer

Hydrogen peroxide 3%

Question 7

A hospital sees a sudden increase in CRE cases. The FIRST step in the infection prevention response should be:

Accepted Answer

Conduct a line listing and review epidemiologic data to identify a common source

Answer

Close the affected unit immediately

Answer

Implement universal contact precautions hospital-wide

Answer

Require all patients to be screened with rectal swabs