Table 2.
Prevalence of antimicrobial resistance in Salmonella isolates by type of sample.
| No. (%) of Resistant Salmonella Isolates by Type of Sample Collected: | ||||
|---|---|---|---|---|
| Carcass Swab | Cloacal Swab | Carcass Drip | p-Value | |
| Antimicrobial Agent | (n = 54) a | (n = 56) a | (n = 60) a | |
| Erythromycin (E) | 54 (100.0) | 56 (100.0) | 60 (100.0) | NA |
| Oxytetracycline (OXT) | 37 (68.5) | 44 (78.6) | 46 (76.7) | 0.436 |
| Chloramphenicol (C) | 0 (0.0) | 0 (0.0) | 2 (3.3) | 0.156 |
| Kanamycin (K) | 0 (0.0) | 4 (7.1) | 1 (1.7) | 0.066 |
| Nalidixic acid (NA) | 0 (0.0) | 1 (1.8) | 1 (1.7) | 0.623 |
| Streptomycin (S) | 34 (63.0) | 48 (85.7) | 54 (90.0) | <0.001 |
| Spectinomycin (SPE) | 46 (85.2) | 51 (91.1) | 54 (90.0) | 0.580 |
| Ciprofloxacin (CIP) | 0 (0.0) | 1 (1.8) | 0 (0.0) | 0.359 |
| Ampicillin (AMP) | 0 (0.0) | 5 (8.9) | 3 (5.0) | 0.086 |
| Cefotaxime (CET) | 2 (3.7) | 13 (23.2) | 9 (15.0) | 0.0130 |
| Doxycycline (DO) | 35 (64.8) | 12 (21.4) | 42 (70.0) | <0.001 |
| Gentamycin (CN) | 0 (0.0) | 3 (5.4) | 3 (5.0) | 0.234 |
| Amoxicillin-clavulanic acid (AMOX) | 2 (3.7) | 4 (7.1) | 1 (1.7) | 0.327 |
| Sulfamethoxazole-trimethoprim (SXT) | 0 (0.0) | 5 (8.9) | 6 (10.0) | 0.063 |
| Ceftazidime (CAZ) | 1 (1.9) | 4 (7.1) | 1 (1.7) | 0.201 |
| Norfloxacin (NOR) | 0 (0.0) | 1 (1.8) | 1 (1.7) | 0.623 |
| p-value | <0.001 | <0.001 | <0.001 | |
a A total of 170 isolates of Salmonella recovered from carcass swabs (n = 54), cloacal swabs (n = 56), and carcass drips (n = 60), based on their serovars were tested for their resistance to antimicrobial agents to determine sample type-specific frequency of resistance; NA: Not applicable.