Table 3.
Antimicrobial resistance phenotypes of Salmonella enterica serovars and strain types isolated from commercial broiler chicken farms.
| Salmonella serovar (phage type)a,b | PFGE typeb | Antimicrobial resistance phenotypec | Number of isolates |
|---|---|---|---|
| S. Enteritidis (PT8) | E1.1 | Sensitive | 18 |
| AMP | 1 | ||
| STR SMX GEN | 1 | ||
| E1.2 | Sensitive | 8 | |
| S. Typhimurium (DT193) | T1.1 | Sensitive | 50 |
| STR | 16 | ||
| STR SMX | 1 | ||
| STR SMX GEN TET | 3 | ||
| STR SMX TET TMS | 1 | ||
| STR SMX GEN TET TMS | 2 | ||
| (DT107) | T1.2 | Sensitive | 47 |
| STR | 21 | ||
| STR SMX CEP | 1 | ||
| STR SMX GEN | 5 | ||
| STR SMX GEN TET | 3 | ||
| STR SMX AXO FOX TIO AMI APR NAL | 1 | ||
| (U302) | T1.3 | Sensitive | 5 |
| STR GEN SMX AMP | 1 | ||
| (NT) | T2 | Sensitive | 1 |
| T3 | Sensitive | 1 | |
| S. Montevideo | V1.1 | Sensitive | 6 |
| V1.2 | SMX TET TMS | 3 | |
| V1.3 | SMX TET TMS | 1 | |
| V1.5 | SMX TET TMS | 6 | |
| STR SMX TET TMS | 3 | ||
| NT | Sensitive | 1 | |
| STR | 1 | ||
| CHL | 1 | ||
| S. Kentucky | NT | Sensitive | 16 |
| STR SMX | 2 | ||
| GEN SMX | 1 | ||
| STR SMX GEN | 6 | ||
| STR SMX GEN TET TMS | 1 | ||
| S. Senftenberg | S1 | Sensitive | 3 |
| STR GEN | 1 | ||
| STR SMX GEN | 4 | ||
| STR SMX GEN TET AMP | 1 | ||
| STR SMX GEN CEP | 2 | ||
| S. Gaminara | G1.1 | SMX TET TMS CEP CHL KAN | 1 |
| STR TET CHL | 2 | ||
| STR SMX TET TMS CHL | 1 | ||
| G1.2 | Sensitive | 2 | |
| G2.1 | CEP AMP | 1 | |
| G3.1 | Sensitive | 1 | |
| S. Mbandaka | M1 | Sensitive | 4 |
| STR SMX GEN TET | 2 | ||
| NT | Sensitive | 1 | |
| TET | 1 | ||
| S. Anatum | A1 | STR SMX TET TMS | 1 |
| A2 | STR SMX TET TMS | 1 | |
| SMX TET TMS | 1 | ||
| A3 | Sensitive | 1 | |
| STR SMX TET TMS | 1 | ||
| S. Ohio | O1 | STR | 1 |
| NT | Sensitive | 3 | |
| S. Tennessee | T1 | SMX TMS | 1 |
| TET TMS | 1 | ||
| S. California | C1 | Sensitive | 1 |
| S. Heidelberg | H1 | Sensitive | 3 |
| STR | 2 | ||
| STR SMX GEN | 1 | ||
| AMP CEP AUG FOX | 1 | ||
| S. Jerusalem | J1 | TET | 1 |
| S. Lille | L1 | TET CEP CHL | 1 |
| NT | TET CEP CHL | 1 | |
| CHL | 1 | ||
| S. Muenchen | U1 | SMX | 1 |
aPhage typing was done only for S. Enteritidis and S. Typhimurium isolates. ( ) = phage type.
bNT = not typable by phage typing (column 1) or PFGE (column 2).
cResistance profiles to the following antibiotics: AMP, ampicillin; AUG, augmentin; FOX, cefoxitin; CEP, cephalothin; GEN, gentamicin; KAN, kanamycin, STR, streptomycin; AMI, amikacin; NAL, nalidixic acid; TET, tetracycline; SMX, sulfadimethoxine; TMS, trimethoprim/sulfamethoxazole; and CHL, chloramphenicol. Sensitive: susceptible to the 19 antibiotics tested.