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. 2015 Apr 7;6(2):e02585-14. doi: 10.1128/mBio.02585-14

TABLE 1.

Demographics of USA300 and USA500 clinical isolates

Parameter No. of isolates
USA300
 USA500
MRSA MSSA Total MRSA MSSA Total
Colonization vs infection
    Colonization 134 20 154 0 0 0
    Infection 33 30 63 14 2 16
    Total 167 50 217 14 2 16
Geographic source
    Chicago 83 45 128 12 0 12
    Los Angeles 84 3 87 1 0 1
    San Francisco 0 2 2 0 2 2
    Connecticut 0 0 0 1a 0 1
    Total 167 50 217 14 2 16
Yr of isolation
    1995 1 0 1 0 0 0
    1996 0 0 0 5 0 5
    1997 0 0 0 2 0 2
    2004 1 0 1 0 0 0
    2008 37 0 37 5 0 5
    2009 92 17 109 0 2 2
    2010 33 21 54 0 0 0
    2011 3 12 15 0 0 0
    Unknown 0 0 0 2 0 1
    Total 167 50 217 14 2 16
a

This isolate is the USA500 reference strain NRS385.