Table 2.
Phylogenetic groups and virulence factors in E. coli O104 strains.
| Location | Year of Isolation | Origin | E. coli Serotypes | * Phylogenetic Group | Strains | Virulence Genes | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| eae | stx1 | stx2 | hlyA | aggR | app | aatA | aaiC | sat | fimH | Pathotype | ||||||
| Mexico | 1998 | ** IMSS | O104:H4 | B1 | 1 | 1 | − | − | − | 1 | 1 | 1 | − | − | 1 | a-EPEC/EAEC |
| 2003 | O104:H7 | 1 | 1 | 1 | − | − | − | − | − | − | − | 1 | STEC | |||
| O104:H12 | 1 | − | − | 1 | − | − | − | − | − | − | 1 | STEC | ||||
| O104:H12 | A | 2 | 2 | 2 | − | − | − | − | − | − | − | 2 | STEC | |||
| Egypt | 1996 | Egypt | O104:H4 | A | 1 | 1 | 1 | − | 1 | 1 | 1 | 1 | 1 | 1 | − | STEC/EAEC |
| Argentina | 2003 | Argentina | O104:H12 | A | 3 | 3 | 2 | 3 | 2 | − | − | − | − | − | 3 | STEC |
| O104:H4 | 1 | 1 | 1 | − | 1 | − | 1 | − | 1 | 1 | − | STEC | ||||
| Bangladesh | 2009 | *** ICDDR,B | O104:H4 | A | 1 | 1 | 1 | − | − | 1 | 1 | 1 | 1 | 1 | − | STEC/EAEC |
| O104:H12 | 1 | 1 | 1 | − | − | 1 | 1 | 1 | 1 | 1 | − | STEC/EAEC | ||||
| O104:H4 | B1 | 1 | 1 | 1 | − | 1 | 1 | 1 | 1 | 1 | 1 | − | STEC/EAEC | |||
| N (%) | 13 | 12 (92) | 10 (77) | 4 (31) | 5(39) | 5 (39) | 6 (46) | 5 (39) | 5 (39) | 5 (39) | 8 (62) | |||||
* Group A: arpA+, chuA-, yjaA-, TspE4.C2-; group B1, arpA+, chuA-, yjaA-, TspE4.C2C+; group B2: arpA-, chuA+, yjaA+, TspE4.C2C+; group C: arpA+, chuA-, yjaA+, TspE4.C2C-. ** IMSS: Instituto Mexicano del Seguro Social (Mexican Institute of Social Security). *** International Centre for Diarrhoeal Disease Research, Bangladesh.