Table 1.
Main characteristics of bacterial strains used
| Escherichia coli | Virotype | Antibiotic resistance profile |
| EC 60 a | STb | CEF, LIN |
| EC 61 a | STb | LIN |
| EC 67 a | F18, STa, STb, EAST1 | LIN, ENR, SUL |
| EC 96 a | STb | AML, CEF, LIN, SUL |
| EC 107 a | – | AML, CEF, LIN, SUL, DOX |
| EC 115 a | F18, EAST1 | AML, LIN, SUL |
| Salmonella spp. | Serotype/Phagotype | Antibiotic resistance profile |
| SP 11 a | Typhimurium/DT 104 | AML, SPC, LIN, SUL, FFC |
| SP 28 a | London | LIN, SUL |
| CECT 443 | Typhimurium | LIN |
| CECT 700 | Infantis | AML, CEF, LIN, SUL, DOX |
| CECT 915 | Choleraesuis | LIN |
| CECT 4300 | Enteriditis | LIN, SUL |
| Clostridium perfringens | Toxigenic type | Antibiotic resistance profile |
| CP 3 a | Type A (alpha toxin) | CEF, LIN, ENR, SUL |
| CP 34 a | Type A (alpha toxin) | SUL |
| CP 52 a | Type A (alpha toxin) | LIN, ENR, SUL |
| CP 89 a | Type A (alpha toxin) | Not detected |
| CP 99 a | Type A (alpha toxin) | LIN, SUL |
| CP H a | Type A (alpha toxin) | SUL |
AML amoxicillina, SPC spectinomycin, ENR enrofloxacin, SUL sulphanomides, DOX doxycycline, CEF cephalotin, LIN lincomycin, FFC florfenicol
a Field isolates recovered from faecal samples collected from swine farms in Spain