Table 7.
Antibiotic resistant and susceptibility of E. coli isolated in feces of growing–finishing pigs
| Resistant | Highly susceptible | ||||
|---|---|---|---|---|---|
| Antibiotic | Treatment | Growing | Finishing | Growing | Finishing |
| Colistin (10 µg) | Control | 100 | 100 | 0 | 0 |
| AGP | 87.5 | 100 | 0 | ||
| Selacid GG | 100 | 100 | 0 | 0 | |
| P-value | 0.581 | ||||
| Amox-colistin (10/10 µg) | Control | 100 | 100 | 0 | 0 |
| AGP | 100 | 100 | 0 | 0 | |
| Selacid GG | 85.7 | 100 | 0 | 0 | |
| P-value | 0.489 | ||||
| Amoxicillin/clavulanic acid (20/10 µg) | Control | 12.5b | 37.5a | 12.5a | 0 |
| AGP | 37.5a | 50a | 0b | 0 | |
| Selacid GG | 0c | 0b | 14.3a | 0 | |
| P-value | <0.0001 | <0.0001 | 0.001 | ||
| Pen-strep (15/15 µg) | Control | 75 | 87.5 | 0 | 0 |
| AGP | 87.5 | 87.5 | 0 | 0 | |
| Selacid GG | 85.7 | 100 | 0 | 0 | |
| P-value | 0.576 | 0.567 | |||
| Flo-doxy (40/20 µg) | Control | 62.5a | 62.5ab | 0 | 0 |
| AGP | 25b | 75.0a | 0 | 0 | |
| Selacid | 42.9a | 42.9b | 0 | 0 | |
| P-value | <0.0001 | 0.013 | |||
| Flumequin (30 µg) | Control | 50 | 75 | 0 | 0b |
| AGP | 37.5 | 62.5 | 0 | 0b | |
| Selacid GG | 42.9 | 57.1 | 0 | 14.3a | |
| P-value | 0.405 | 0.273 | <0.0001 | ||
| Cefotaxime (30 µg) | Control | 0b | 25a | 37.5c | 12.5b |
| AGP | 25a | 25a | 12.5b | 0c | |
| Selacid GG | 0b | 0b | 57.1a | 28.6a | |
| P-value | <0.0001 | <0.0001 | <0.0001 | <0.0001 | |
| Ceftiofur (30 µg) | Control | 12.5b | 50a | 0b | 0 |
| AGP | 50a | 62.5a | 12.5a | 0 | |
| Selacid | 14.3b | 28.6b | 14.3a | 0 | |
| P-value | <0.0001 | 0.002 | 0.001 | ||
| Ciprofloxacin (5 µg) | Control | 25 | 62.5 | 12.5a | 12.5a |
| AGP | 25 | 50 | 0b | 12.5a | |
| Selacid GG | 14.3 | 57.1 | 14.3a | 0b | |
| P-value | 0.169 | 0.499 | 0.001 | 0.002 | |
| Norfloxacin (10 µg) | Control | 12.5 | 62.5ab | 0b | 0b |
| AGP | 12.5 | 75.0a | 0b | 12.5a | |
| Selacid GG | 14.3 | 42.9b | 14.3a | 0b | |
| P-value | 0.921 | 0.013 | <0.0001 | <0.0001 | |
| Enrofloxacin (5 µg) | Control | 37.5 | 50 | 12.5a | 12.5 |
| AGP | 25 | 62.5 | 12.5a | 12.5 | |
| Selacid GG | 28.6 | 57.1 | 0b | 14.3 | |
| P-value | 0.256 | 0.499 | 0.002 | 0.921 | |
More data on Low Susceptible and Intermediate Susceptible of E. coli isolated in feces of growing and finishing pigs are presented in supplementary Appendix Table 1 and 2.
a,bValues in a column with no common superscripts differ significantly (P ≤ 0.05).