Especially the Panton Valentine leukocidin ( PVL ) genes are of interest because they are a unique feature of CA-MRSA.
2.
The two MRSA clones in the United States most closely associated with community outbreaks, USA400 ( MW2 strain, ST1 lineage ) and USA300, often contain Panton-Valentine leukocidin ( PVL ) genes and, more frequently, have been associated with skin and soft tissue infections.
3.
In the United States, most cases of CA-MRSA are caused by a CC8 strain designated ST8 : USA300, which carries SCC " mec " type IV, Panton Valentine leukocidin, PSM-alpha and enterotoxins Q and K, and ST1 : USA400.
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