Table 3.
Virulence factors detected in selected E. coli isolates recovered from wastewater and process waters from poultry and pig slaughterhouses.
|
E. coli (n = 35), % Poultry Slaughterhouses |
E. coli (n = 36), % Pig Slaughterhouses |
||
|---|---|---|---|
| Adhesins | |||
| fimH | Type 1 fimbriae | 94.3 | 91.7 |
| papC | Genes of P fimbriae operon | 5.7 | 11.1 |
| papEFG | Genes of P fimbriae operon | 5.7 | 8.3 |
| sfa/foc | S or F1C fimbriae | 5.7 | 11.1 |
| focG | F1C fimbriae adhesin | 0 | 0 |
| iha | Adhesin siderophore | 0 | 0 |
| F10 papA | P fimbriae subunit variant | 0 | 0 |
| tsh | Temperature sensitive hemagglutinin | 0 | 0 |
| hra | Heat-resistant agglutinin | 0 | 0 |
| afa/draBC | Dr-binding adhesins | 0 | 0 |
| Toxins | |||
| astA | Enteroaggregative E. coli toxin | 40.0 | 16.7 |
| vat | Vacuolating toxin | 8.6 | 5.6 |
| pic | Serine protease | 8.6 | 2.8 |
| hlyD | Alpha-hemolysin | 0 | 2.8 |
| cnf1 | Cytotoxic necrotizing factor | 0 | 2.8 |
| sat | Secreted autotransporter toxin | 0 | 0 |
| Siderophores | |||
| iutA | Aerobactin receptor | 51.4 | 58.3 |
| iroN | Salmochelin receptor | 48.6 | 30.6 |
| fyuA | Yersiniabactin receptor | 37.1 | 27.8 |
| ireA | Siderophore receptor | 0 | 0 |
| Capsule | |||
| kpsM II | kpsM II group 2 capsule | 22.9 | 5.6 |
| K1 | K1 group 2 capsule variants | 0 | 0 |
| K2 | K2 group 2 capsule variants | 0 | 0 |
| K5 | K5 group 2 capsule variants | 0 | 0 |
| kpsMT III | Group 3 capsule | 0 | 0 |