Legend for E. coli typing (swine):
Genes encoding the following gene products:
| Adhesines | Virulence factors and toxins |
| F4 (F4 fimbriae) | Intimine (required for the penetration into epithelial cells) |
| F5 (F5 fimbriae) | LTI (heat labile enterotoxin) |
| F6 (F6 fimbriae) | STI (heat stable enterotoxin) |
| F18 (F18 fimbriae) | STII (heat stable enterotoxin) |
| F41 (F41 fimbriae) | EAST-I (heat stable enterotoxin) |
| fimH (Type 1 fimbriae) | stx2e (Shiga toxin variant 2e) |
| fimA (Type 1 fimbriae) | cdtB (cytolethal distending toxin) |
| papC (P fimbriae) | cnf1 (zytotoxic nekrotising factor type 1) |
| aidA (AIDA-I autotransporter adhesine) | iucD (required for the synthesis of iron complexing agents) |
| paa (porcine adherence factor) | escV (type III sekretions system) |
| pic (serin protease autotransporter) |
Pathogenic isolates generally carry a combination of fimbriae / adhesins and toxins. Several toxins and adhesins can be present at the same time and in different combinations.