Tohcs in Clinical Microbiology
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چکیده
The clinical importance of coagulase-positive staphylococci is well-known. In fact, Staphylococcus aureus is so often considered a pathogen that few laboratories appreciate that up to 25% of these strains isolated from blood cultures are actually contaminants from skin flora.' Conversely, coagulase-negative staphylococci have so long been considered an environmental contaminant that the pathogenic significance of such an isolate may go unrecognized. Moreover, since 1960 there has been a marked increase in the incidence of infections caused by coagulase-negative staphylococci, paralleling the increase in numbers of compromised hosts. These staphylococci are particularly important in nosocomial infections. Therefore, it seems pertinent to review both the speciation and the infections caused by these organisms.
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