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Discussion

All of the following statement regarding coagulase negative Staphylococcus spp (CONS) are true, Except?

  • A.S. epidermidis and S. saprophyticus are coagulase negative staphylococci 
  • B.Infection with S. epidermidis are usually hospital acquired
  • C.S. saprophyticus is normal flora of humans skin surface
  • D.Both are common pathogens in urinary tract infections

Answer: C

Correct answer: S. saprophyticus is normal flora of humans skin surface

S. saprophyticus belongs to the genitourinary flora rather than being a general skin commensal; it is S. epidermidis that colonises skin everywhere. The distinction matters clinically, because S. saprophyticus in a urine culture from a young woman is a genuine pathogen while S. epidermidis in a blood culture is more often a contaminant.

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