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Table 3 Molecular epidemiology of USA300 PFT strains (n = 58)

From: Higher incidence of perineal community acquired MRSA infections among toddlers

USA300 PFT subtypes n(%)

Diversilab type* n(%)

mecA

SCCmec type

ACME

lukSF-PV

cap5

1 - 42(72%)

USA300-41(98%)

USA500-1(24%)

42

IVa-42

42

42

30(71%)

2 - 6(10%)

USA300-4(67%)

USA500-2(33%)

6

IVa-6

6

6

6

3 - 4(7%)

USA300-4

4

IVa-4

4

4

4

4 - 2(3%)

USA300-2

2

IVa-2

1

2

2

5 - 2(3%)

USA300-2

2

IVa-2

2

2

2

6 - 1(2%)

USA300-1

1

IVa-1

0

1

1

7 - 1(2%)

USA300-1

1

IVa-1

1

1

1

Total(n)

58(100%)

58(100%)

58(100%)

56(97%)

58(100%)

46(79%)

  1. PFT: Pulsed field type; SCC: Staphylococcal Cassette Chromosome, lukSF-PV genes that encode Panton-Valentine leukocidin (PVL), ACME: Arginine catabolic mobile element.
  2. *The DiversiLab strain types are named as corresponding PFT's based on a standardized comparison.
  3. For USA300 PFT subtypes please see figure 2.