Table 2.
Characterization of pathogenic E. coli based on different virulence genes and phylogenetic groups
| Isolates | eaeA | aggR | ipaH | lt | st | stx1 | stx2 | daaD | Phylogeny group | Type of pathogena | Serotype |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C1 | − | − | − | + | − | − | − | − | A | ETEC | UT |
| M1 | − | − | − | − | − | + | + | − | B1 | STEC | Rough |
| M2 | − | − | + | − | − | − | − | − | B2 | EIEC | UT |
| M3 | − | − | − | + | − | − | − | − | B2 | ETEC | UT |
| M4 | − | − | − | + | − | − | − | − | A | ETEC | O124 |
| M5 | − | − | − | + | − | − | − | − | A | ETEC | Rough |
| M6 | − | + | − | − | − | − | − | − | B1 | EAEC | O9 |
| M7 | − | + | − | − | − | − | − | − | B1 | EAEC | Rough |
| F1 | − | − | − | + | − | − | − | − | B1 | ETEC | UT |
| B1 | − | − | − | − | − | + | − | − | B2 | STEC | UT |
| B2 | − | + | − | − | − | − | − | − | A | EAEC | O124 |
| B3 | + | − | − | − | − | − | − | − | B2 | EPEC | O124 |
| P1 | − | + | − | − | − | − | − | − | B2 | EAEC | O124 |
| P2 | − | − | + | − | − | − | − | − | B1 | EIEC | UT |
ETEC strains are stand/or lt positive; STEC strains are stx1 and/or stx2 positive; EPEC strains are eaeA positive; EAEC strains are aggR positive; EIEC strains are ipaH positive (Guion et al. 2008); ‘+’, positive, ‘−’, negative, UT, untypable
aClassification of pathogenic E. coli is done according to Guion et al. (2008)