TABLE 1.
Antibiotic susceptibility profiles of cephalosporin-resistant V. alginolyticus strains and corresponding recipient transconjugant E. coli strain J53
| Strain | 2015 isolation date | Source | β-Lactamase gene product | MIC (mg/liter)b of: |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AMP | AMC | CTX | CRO | NAL | CIP | AMK | TET | CHL | GEN | SXT | ||||
| J53 | 1 | 4/2 | 0.03 | 0.015 | 1 | 0.03 | 0.5 | 0.5 | 2 | 0.25 | 0.25/4.75 | |||
| VA1 | 1/14 | Shrimp | PER-1 | >64 | 16/8 | >16 | >16 | 0.5 | 0.06 | 4 | 2 | 0.25 | 32 | >16/304 |
| T-VA1 | PER-1 | >64 | 8/4 | >16 | >16 | 4 | 0.015 | 0.5 | 8 | 2 | 32 | 16/304 | ||
| VA2 | 1/20 | Shrimp | VEB-1 | >64 | 4/2 | >16 | >16 | 32 | >16 | 1 | 8 | 32 | 4 | >16/304 |
| VAS3-1 | 3/14 | Chicken | CMY-2 | >64 | 64/32 | 8 | 16 | 16 | 0.5 | 0.5 | 16 | 32 | 1 | >16/304 |
| T-VAS3-1 | CMY-2 | >64 | 64/32 | 8 | >16 | 8 | 0.5 | 0.5 | 8 | 16 | 1 | 8/152 | ||
| VA4 | 3/4 | Shrimp | NDa | >64 | 4/2 | >16 | >16 | 0.5 | 0.5 | 2 | 4 | >32 | 4 | 8/152 |
| VA-5 | 3/14 | Shrimp | VEB-1 | >64 | 8/4 | >16 | >16 | 2 | 1 | 4 | 0.5 | 1 | 8 | 0.25/4.75 |
| T-VA5 | VEB-1 | >64 | 4/2 | 2 | 2 | 8 | 0.03 | 0.5 | 0.5 | 2 | 8 | 0.25/4.75 | ||
| VA6 | 3/30 | Shrimp | PER-1 | >64 | 4/2 | 16 | 8 | 1 | 0.25 | 4 | 2 | 2 | 4 | 8/152 |
a
ND, not detected.
b
AMP, ampicillin; AMC, amoxicillin-clavulanic acid; CRO, ceftriaxone; CTX, cefotaxime; NAL, nalidixic acid; CIP, ciprofloxacin; AMK, amikacin; TET, tetracycline; CHL, chloramphenicol; GEN, gentamicin; SXT, trimethoprim-sulfamethoxazole.