<p>This 2005 scanning electron micrograph (SEM) depicted numerous clumps of methicillin-resistant <i>Staphylococcus aureus</i> bacteria, commonly referred to by the acronym, MRSA; Magnified 9560x.
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Recently recognized outbreaks, or clusters of MRSA in community settings have been associated with strains that have some unique microbiologic and genetic properties, compared with the traditional hospital-based MRSA strains, which suggests some biologic properties, e.g., virulence factors like toxins, may allow the community strains to spread more easily, or cause more skin disease. A common strain named USA300-0114 has caused many such outbreaks in the United States. See PHIL 7821 for a black and white version of this micrograph.
Janice Haney Carr, Centers for Disease Control and Prevention
2005
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