Table 2.
Persistence of nasal colonization with Staphylococcus aureus, Enterobacteriaceae and nonfermenting pathogens
| Pathogen/pathogen group | Participation ata | Negative at all time points | Positive at 1 time pointa | Positive at 2 time pointsa | Positive at 3 time pointsa | Totala |
|---|---|---|---|---|---|---|
| S. aureus | 1 time point only | 304 (71.2) | 123 (28.8) | NA | NA | 427 (100) |
| 2 time points | 163 (57.6) | 57 (20.1) | 63 (22.3) | NA | 283 (100) | |
| 3 time points | 643 (55.1) | 190 (16.3) | 129 (11.0) | 206 (17.6) | 1168 (100) | |
| Enterobacteriaceae | 1 time point only | 329 (77.0) | 98 (23.0) | NA | NA | 427 (100) |
| 2 time points | 193 (68.2) | 57 (20.1) | 33 (11.7) | NA | 283 (100) | |
| 3 time points | 728 (62.3) | 199 (17.0) | 100 (8.6) | 141 (12.1) | 1168 (100) | |
| Nonfermenting pathogen | 1 time point only | 424 (99.3) | 3 (0.7) | NA | NA | 427 (100) |
| 2 time points | 272 (96.1) | 11 (3.9) | 0 (0) | NA | 283 (100) | |
| 3 time points | 1113 (95.3) | 52 (4.5) | 3 (0.3) | 0 (0) | 1168 (100) |
NA, not applicable.
a
Number (% per row) of participants in whom colonization with respective group of bacteria was detected stratified by participation at one, two or three times of participation in the study.