American Society of Microbiology ABMM ABMM Question # 78 Topic 3 Discussion

American Society of Microbiology ABMM ABMM Question # 78 Topic 3 Discussion

ABMM Exam Topic 3 Question 78 Discussion:
Question #: 78
Topic #: 3

Staphylococcus epidermidis, a common cause of healthcare-associated infections, forms biofilms on medical devices. The production of polysaccharide intercellular adhesin (PIA) is a key factor in biofilm maturation. The expression of PIA is primarily regulated by:


A.

A two-component regulatory system involving AgrA and AgrC.


B.

The icaADBC operon, whose expression is influenced by environmental cues.


C.

The stringent response pathway activated during nutrient limitation.


D.

Horizontal gene transfer of the ica operon.


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