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Staphylococcus epidermidis
colonies on Tryptic Soy Agar
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S. epidermidis forms white, raised, cohesive colonies approximately 1–2 millimeter in diameter after overnight incubation on Tryptic Soy Agar. It is nonhemolytic on blood agar. It is a catalase-positive, coagulase-negative, facultative anaerobe that can grow by aerobic respiration or by fermentation. Some strains may not ferment.
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Microscopy:
Gram-positive cocci, nonmotile, tend to be arranged in grape-like clusters. |
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