TABLE 3.

Molecular characteristics of invasive MRSA isolates, according to PFGE typea

PFGE typeNo. (%) of isolates testedDINo. (%) of isolates
With indicated toxin detected by PCRND
TSST-1PVLSEASEBSECSED
USA100063 (53.6)0.9232 (0.2)2 (0.2)9 (1.5)2 (0.3)1 (0.2)454 (74.4)453 (42.6)
USA20015 (0.8)0.69513 (86.7)0 (0)10 (76.9)0 (0)0 (0)0 (0)2 (13.3)
USA300627 (31.6)0.5660 (0)605 (96.5)0 (0)0 (0)0 (0)3 (1)313 (49.9)
USA4006 (0.3)0.80 (0)4 (66.7)1 (25)1 (25)1 (25)0 (0)2 (33.3)
USA50074 (3.7)0.8810 (0)0 (0)40 (88.9)31 (68.9)0 (0)1 (2.2)29 (39.2)
USA60014 (0.7)0.8460 (0)0 (0)1 (11.1)1 (11.1)0 (0)0 (0)5 (35.7)
USA7008 (0.4)0.7860 (0)0 (0)0 (0)0 (0)0 (0)0 (0)7 (87.5)
USA80038 (1.9)0.8990 (0)0 (0)2 (14.3)0 (0)0 (0)5 (35.7)24 (63.2)
USA100016 (0.8)0.7240 (0)2 (12.5)0 (0)6 (75)0 (0)0 (0)8 (50)
USA11008 (0.4)0.4640 (0)6 (75)0 (0)0 (0)0 (0)0 (0)4 (50)
Iberian36 (1.8)0.8871 (2.8)1 (2.8)0 (0)2 (13.3)1 (6.7)1 (6.7)21 (58.3)
Novel type11 (0.6)0.9820 (0)0 (0)0 (0)0 (0)0 (0)4 (57.1)4 (36.4)
EMRSA154 (0.2)0.830 (0)1 (25)00004 (100)
Group D2 (0.1)NA0 (0)0 (0)0 (0)1 (100)0 (0)0 (0)1 (50)
Nontypeable1 (0.1)NA0 (0)0 (0)0 (0)0 (0)0 (0)0 (0)0 (0)
Not done61 (3.1)NA0 (0)18 (29.5)000061 (100)
Total1,98416 (0.8)639 (32.2)63 (3.2)44 (2.2)3 (0.2)468 (23.6)938 (47.3)
  • a NA, not applicable; ND, not done.