I picked the choice (A. Type III protein secretion: prevents opsonization of pat

Question

I picked the choice (A. Type III protein secretion: prevents opsonization of pathogen) and it was wrong.

Which of the following virulence factors among A-D is correctly matched with its definition or characterization? Type III protein secretion: prevents opsonization of pathogen Phase variation: allows pathogen to switch between different forms of an extracellular antigen (e.g., flagellum) Protein A: a microbial factor that allows for attachment, typically a surface protein or surface glycoprotein Prevention of lysosome:phagosome fusion: mechanism employed by an extracellular pathogen All are correctly matched

Explanation / Answer

Answer:C

Protein A found in Staphylococcus aureus, it is the cells surface protein. Located on cell wall. Immunoglobulin G (IgG) binds to protein A by its Fc end, thereby preventing complement from interacting with bound IgG.

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