Characteristics of Methicillin-Resistant Staphylococcus aureus Isolates from Patients Without Skin and Soft Tissue Infections (n = 199)
| Syndrome | Strains Tested (n = 199) | Strains Susceptible to Clindamycin | Strains Containing SCCmec IV | Strains with the PVL Genes |
|---|---|---|---|---|
| Respiratory tract* | 63 (32) | 13 (21) | 16 (25) | 13 (21) |
| Pneumonia | 26 | 5 (19) | 6 (23) | 5 (19) |
| Empyema | 4 | 2 (50) | 2 (50) | 2 (50) |
| Ventilator-associated pneumonia | 19 | 4 (21) | 5 (26) | 4 (21) |
| Other respiratory isolates† | 14‡ | 2 (14) | 3 (21) | 2 (14) |
| Bacteremia syndromes | 60 (30) | 14 (23) | 19 (32) | 11 (18) |
| Bacteremia | 18 | 4 (22) | 6 (33) | 5 (28) |
| Line infection | 38‡ | 8 (21) | 10 (26) | 4 (11) |
| Endocarditis§ | 4 | 2 (50) | 2 (50) | 2 (50) |
| Bone and joint | 33 (17) | 16 (48) | 17 (52) | 13 (39) |
| Osteomyelitis | 18‡ | 7 (39) | 9 (50) | 7 (39) |
| Septic arthritis | 12 | 7 (58) | 7 (58) | 5 (42) |
| Septic bursitis | 3 | 2 (66) | 1 (33) | 1 (33) |
| Urinary tract | 23 (12) | 5 (22) | 4 (17) | 3 (13) |
| Other‖ | 20 (10) | 9 (45) | 9 (45) | 5 (25) |
All data provided as n (%).
* Isolates from the upper respiratory tract designated as colonization isolates were excluded; isolates from patients with cystic fibrosis were also excluded.
† Includes isolates obtained from patients with bronchitis, chronic laryngitis, sinusitis, tracheitis, and acute otitis media.
‡ Isolates with an untypeable SCCmec element were included.
§ As defined by modified Duke criteria.
‖ Including intra-abdominal fluid, deep intraperitoneal abscess, gall bladder, pericardial fluid, conjunctiva or the external ear canal.
PVL, Panton-Valentine leukocidin.