Table 4.
Serotypes, phylogenetic groups and virulence genes in E. coli O104 ECOR and references strains.
| Origin | Year of Isolation | E. coli Serotypes | Phylogenetic Group | Strains | Virulence Genes | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| eae | stx1 | hlyA | aggR | app | aatA | aaiC | sat | fimH | Pathotype | |||||
| ECOR26 | 1984 | O104:H21 | A | 1 | 1 | − | 1 | − | − | − | − | − | 1 | a-EPEC |
| ECOR27 | O104:H21 | 1 | − | 1 | 1 | − | − | − | − | − | 1 | STEC | ||
| ECOR28 | O104:H2 | 1 | − | − | 1 | − | − | − | − | − | 1 | ND | ||
| SSI | 2013 | O104:H4 | D | 1 | − | − | − | 1 | 1 | 1 | 1 | 1 | − | EAEC |
| 2018 | O104:H4 | B1 | 1 | − | − | − | 1 | 1 | 1 | 1 | 1 | − | EAEC | |
| GBRU | 1999 | O9:H12 | A | 1 | − | − | − | 1 | - | − | − | − | 1 | EAEC |
| ECOR16 | 1984 | O9:H10 | 1 | − | − | − | − | − | − | − | 1 | ND | ||
| N (%) | 7 | 1 (14) | 1 (14) | 3 (43) | 3 (43) | 2 (29) | 2 (29) | 2 (29) | 2 (29) | 5 (71) | ||||
All the reference strains did not present the stx2. ECOR: Escherichia coli reference. SSI: Statens Serum Institute. GBRU: Gastrointestinal Bacteria Reference Unit, Public Health England, London, UK. ND: Not determined.