Sera were collected from multiple patients diagnosed with serious staphylococcal infections such as sepsis, pneumonia, e

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Sera were collected from multiple patients diagnosed withserious staphylococcal infections such as sepsis, pneumonia,endocarditis, prosthetic joint infections, and osteomyelitis. Thesesera were analyzed for the presence of various cytokines. It wasobserved that patients who were infectedwith Staphylococcus aureus often had elevatedlevels of several cytokines, notably T cell-derived cytokines, intheir sera, but not patients infected with coagulase-negativestaphylococci such as S.epidermidis and S. lugdunensis.Which S. aureus virulence factor was likelyresponsible for the elevated levels of cytokines in the sera ofsome patients?
a.
Coagulase
b.
Protein A
c.
Superantigens
d.
Exfoliative toxins
e.
Catalase
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