Table 3.
Salmonella serotypes and observed antimicrobial resistance phenotypes recovered from lymph nodes (mandibular, mesenteric, mediastinal, and subiliac), feces, and hides of beef cattle at harvest in a Mexico slaughter facility
| Sample type (no. of isolates) | Serotype | Antimicrobial resistance phenotypea | No. of samples |
|---|---|---|---|
| Mandibular (18) | Reading | Te | 5 |
| Anatum | Te | 1 | |
| Muenster | NA | 1 | |
| Anatum | Am, Ap, F, Su, Te, TS | 1 | |
| Mediastinal (2) | Reading | Te | 2 |
| Mesenteric (18) | Reading | Te | 2 |
| Kentucky | Te | 1 | |
| Anatum | Te | 1 | |
| Meleagridis | Su, Te | 1 | |
| Give | S, Te | 1 | |
| Meleagridis | S, Su, Te | 3 | |
| Meleagridis | Am, Ap, F, S, Su, Te | 1 | |
| Subiliac (18) | Anatum | Te | 2 |
| Reading | Te | 3 | |
| Cerro | (F), (Te) | 1 | |
| Meleagridis | S, Su, Te | 3 | |
| Anatum | Am, NA, Su, Te, TS | 1 | |
| Fecal (18) | Reading | Te | 1 |
| Meleagridis | S, Su, Te | 1 | |
| Nontypeable | Ap, Su, Te, TS | 1 | |
| Hide (17) | Reading | Te | 1 |
| Anatum | Te | 1 | |
| Anatum | S, Su, Te | 1 | |
| Anatum | (F), (C), Su | 1 |
a
Am, amoxicillin-clavulanic acid; Ap, ampicillin; F, cefoxitin; C, chloramphenicol; NA, nalidixic acid; S, streptomycin; Su, sulfisoxazole; Te, tetracycline; TS, trimethoprim-sulfamethoxazole. Parentheses indicate intermediate resistance.