TABLE 3.
Genotypic chlorhexidine resistance by antimicrobial resistance
| Antibiotic and phenotype | No. (%) |
|||
|---|---|---|---|---|
| Clinical isolates (n = 341) |
Colonizing isolates (n = 274) |
|||
| qacA/B negative (n = 336) | qacA/B positive (n = 5) | qacA/B negative (n = 269) | qacA/B positive (n = 5) | |
| Ciprofloxacina | ||||
| Susceptible | 216 (100.0) | 0 (0) | 179 (100.0) | 0 (0) |
| Resistant | 120 (96.0) | 5 (4.0) | 90 (94.7) | 5 (5.3) |
| Clindamycinb | ||||
| Susceptible | 302 (98.4) | 5 (1.6) | 225 (97.9) | 5 (2.1) |
| Resistant | 34 (100.0) | 0 (0) | 44 (100.0) | 0 (0) |
| Daptomycin | ||||
| Susceptible | 335 (98.5) | 5 (1.5) | 269 (98.2) | 5 (1.8) |
| Resistant | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Erythromycin | ||||
| Susceptible | 35 (100.0) | 0 (0) | 32 (100.0) | 0 (0) |
| Resistant | 301 (98.4) | 5 (1.6) | 237 (97.9) | 5 (2.0) |
| Gentamicin | ||||
| Susceptible | 334 (98.5) | 5 (1.5) | 268 (98.2) | 5 (1.8) |
| Resistant | 1 (100.0) | 0 (0) | 1 (100.0) | 0 (0) |
| Linezolid | ||||
| Susceptible | 335 (98.5) | 5 (1.5) | 269 (98.2) | 5 (1.8) |
| Resistant | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Rifampin | ||||
| Susceptible | 335 (98.5) | 5 (1.5) | 268 (98.2) | 5 (1.8) |
| Resistant | 1 (100.0) | 0 (0) | 0 (0) | 0 (0) |
| Tetracycline | ||||
| Susceptible | 324 (98.5) | 5 (1.5) | 246 (98.0) | 5 (2.0) |
| Resistant | 12 (100.0) | 0 (0) | 23 (100.0) | 0 (0) |
| Trimethoprim-sulfamethoxazole | ||||
| Susceptible | 336 (98.5) | 5 (1.5) | 268 (98.2) | 5 (1.8) |
| Resistant | 0 (0) | 0 (0) | 1 (100.0) | 0 (0) |
a
P < 0.01 by Fisher's exact test for both clinical and colonizing isolates.
b
Twenty-nine (10.0%) of the 290 clinical isolates tested and 28 (12.4%) of the 225 colonizing isolates tested showed inducible clindamycin resistance.