TABLE 2.

Source of infection; PFGE and PCR results versus epidemiologic sourcea

CharacteristicNo. (%) of casesP value
TotalCommunity associatedHealth care associated, community onsetHealth care associated, hospital onset
All cases2105011545
Source
    CVC50 (24)0 (0)34 (30)16 (36)<0.001
    Graft infection8 (4)0 (0)6 (5)2 (4)NS
    Infective endocarditis19 (9)12 (24)6 (5)1 (2)<0.001
    Skin/wound52 (25)21 (42)28 (24)3 (7)<0.001
    Respiratory tract22 (10)5 (10)10 (9)7 (16)NS
    Genitourinary tract9 (4)2 (4)6 (5)1 (2)NS
    Intra-abdominal3 (1)0 (0)3 (3)0 (0)NS
    Multiple5 (2)2 (4)1 (1)2 (4)NS
    Unknown42 (20)8 (16)21 (18)13 (29)NS
PFGE type
    USA100104 (50)7 (14)70 (61)27 (60)<0.001
    USA30074 (35)39 (78)26 (23)9 (20)<0.001
    USA4002 (1)1 (2)1 (1)0 (0)NS
    USA5002 (1)1 (2)1 (1)0 (0)NS
    USA6008 (4)0 (0)7 (6)1 (2)NS
    USA7001 (0)0 (0)1 (1)0 (0)NS
    USA9001 (0)0 (0)1 (1)0 (0)NS
    Unique18 (9)2 (4)8 (7)8 (18)0.037
SCCmec type
    II103 (49)6 (12)71 (62)26 (58)<0.001
    IV101 (48)42 (84)43 (37)16 (36)<0.001
    Other6 (3)2 (4)1 (1)3 (7)NS
agr group
    I90 (43)40 (80)36 (31)14 (31)<0.001
    II118 (56)9 (18)78 (68)31 (69)<0.001
    III2 (1)1 (2)1 (1)0 (0)NS
PVL toxin gene76 (36)40 (80)27 (23)9 (20)<0.001
  • a Statistical comparisons were made between the three epidemiological groups (community associated, health care associated—community onset, and health care associated—hospital onset. NS, not significant; CVC, central venous catheter.