TABLE 1.
Nasal colonization and microbiological characteristics of isolates from 2000 versus 2006
| Characteristic | Value for:
|
P | |
|---|---|---|---|
| 2000 (total participants, 299) | 2006 (total participants, 301) | ||
| No. (%) of participants with S. aureus | 81 (27.1) | 119 (39.5%)a | 0.001 |
| No. (%) of S. aureus isolates | 0.008 | ||
| MSSA | 59 (72.8) | 66 (54.1) | |
| MRSA | 22 (27.2) | 56 (45.9) | |
| Overall MRSA colonization rate (%) | 7.4 | 18.6 | 0.0001 |
| PFGE pattern of MRSA (no. [%]) | 0.0001 | ||
| USA-500 | 22 (100) | 14 (25) | |
| USA-300 | 0 | 42 (75) | |
| PVL (%) | |||
| MSSA | NAb | 1 (1.5%) | |
| USA-500 | 0 | 0 | 0.0001 |
| USA-300 | 41 (97.6%) | ||
a
Three participants had mixed colonization with both MSSA and MRSA; thus, the total number of isolates was 122.
b
NA, not available for analysis.