TABLE 1.
Susceptibilities of Salmonella serovar Typhimurium isolates to antibiotics, detergents, and dyes
| Isolatea | MICb
|
||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Antibiotics (μg/ml)
|
Dyes (μg/ml)
|
Detergents (mg/ml)
|
|||||||||||||||
| NAL | CIP | TET | CHL | FOX | AMC | ERY | RIF | NOV | ACF | MB | EtBr | AO | DHCO | CTAB | SDS | NP-40 | |
| L3 | 8 | 0.03 | 4 | 2 | 1 | 1 | 2 | 16 | 32 | 64 | 128 | 32 | 128 | 1 | 16 | 0.25 | 2 |
| L5 | 16 | 0.25 | 8 | 64 | 64 | 2 | 4 | 32 | 32 | 64 | 128 | 32 | 128 | 1 | 16 | 0.25 | 2 |
| L6 | 64 | 0.25 | 8 | 32 | 16 | 4 | 512 | 16 | 256 | >512 | 128 | >512 | >512 | >16 | >16 | 16 | >16 |
| L10 | 32 | 0.12 | 16 | 32 | 16 | 4 | 512 | 32 | 512 | >512 | >512 | >512 | >512 | 2 | >16 | 2 | 16 |
| L12 | 32 | 0.5 | 16 | 32 | 16 | 4 | 512 | 16 | 256 | >512 | >512 | >512 | >512 | 4 | >16 | 16 | >16 |
| L15 | 32 | 0.25 | 8 | 32 | 8 | 2 | 4 | 16 | 256 | >512 | >512 | >512 | >512 | 2 | >16 | 16 | >16 |
| L18 | 32 | 0.5 | 16 | 32 | 32 | 16 | 32 | 16 | 32 | 256 | 128 | 32 | 128 | 1 | 4 | 0.25 | 2 |
| L19 | 2 | 0.03 | 2 | 2 | 1 | 1 | 16 | 128 | 16 | 512 | >512 | >512 | >512 | 1 | >16 | 0.25 | 2 |
| T39 | 16 | 1 | 8 | 32 | 32 | 4 | 512 | 128 | 256 | >512 | >512 | >512 | >512 | 2 | 16 | 1 | 4 |
| LX1054 | 16 | 0.25 | 2 | 2 | 2 | 2 | 4 | 16 | 16 | 64 | 32 | 32 | 128 | 1 | 4 | 0.5 | 2 |
a
L3, pretherapy parent isolate; L5, L6, L10, L12, L15, and L18, posttherapy isolates; L19, Salmonella serovar Typhimurium NCTC 74. T39 (parent strain) and LX1054 (acrB mutant) were from Lacroix et al. (16).
b
NAL, nalidixic acid; CIP, ciprofloxacin; TET, tetracycline; CHL, chloramphenicol; FOX, cefoxitin; AMC, ampicillin; ERY, erythromycin; RIF, rifampin; NOV, novobiocin; ACF, acriflavine; MB, methylene blue; EtBr, ethidium bromide; AO, acridine orange; DHCO, dehydrocholic acid; SDS, sodium dodecyl sulfate; NP-40, Nonidet P-40.