TABLE 1.

Characteristics of patients with S. aureus bacteremia according to methicillin susceptibility and SCCmec type

CharacteristicSCCmec typeaP
IVa (n= 52)II (n = 87)Other MRSA (n = 24)MSSA (n = 90)
Age (yr)*53.5 (20-91)64.0 (21-88)57.5 (25-87)58.0 (22-90)0.02
No. female25 (48.1)45 (51.7)9 (37.0)43 (47.8)0.7
Race
    Caucasians13 (25.0)40 (46.0)5 (20.8)32 (35.6)0.1
    African-Americans39 (75.0)45 (51.7)19 (79.2)54 (60.0)0.1
    Others02 (2.3)03 (4.4)
Diabetes18 (34.6)40 (46.0)12 (50.0)39 (43.2)0.5
Hemodialysis dependent6 (11.5)18 (20.7)11 (45.8)35 (38.9)0.005
Cardiac disease15 (28.8)52 (59.8)9 (37.5)41 (45.6)0.004
Injection drug users17 (32.7)1 (1.1)1 (4.2)11 (12.2)<0.001
Endovascular prosthesis7 (13.5)16 (18.4)6 (25.0)16 (17.8)0.7
Community associated27 (51.9)19 (21.8)5 (20.8)24 (26.7)0.001
Illness severity index†2.7 ± 1.54.0 ± 1.33.4 ± 1.33.3 ± 1.2<0.001
Source
    IVC10 (19.2)21 (24.1)8 (33.3)24 (26.3)0.6
    Endocarditis3 (5.8)3 (3.4)03 (3.3)0.8
    Other endovascular tissues5 (9.6)3 (3.4)6 (25.0)17 (18.9)0.006
    Soft tissue15 (28.8)10 (11.5)2 (8.3)10 (11.1)0.001
    Osteomyelitis10 (19.2)13 (14.9)1 (4.2)12 (13.3)0.5
    Miscellaneous4 (7.7)15 (17.2)4 (16.7)9 (10.0)0.1
    Unknown5 (9.6)21 (26.4)3 (12.5)17 (18.9)0.04
Removable focus16 (30.8)33 (37.9)15 (62.5)36 (40.0)0.1
Focus removed15 (93.8)32 (97.0)14 (93.3)36 (100.0)0.7
Days to removal*1.5 (0-5)3 (0-41)2 (0-7)2 (0-13)0.2
  • a Results represent number (patients, days, etc.) with the percentage indicated in parentheses unless otherwise specified. *, Median (range); †, mean ± the standard deviation.