Table 3.
Diversity of diarrheagenic groups in E. coli O9 strains.
| Location | Isolation Year | Origin | Serotype | Phylogenetic Group * | Strains | Virulence Genes | Pathotype | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| eae | stx1 | hlyA | aggR | app | aatA | sat | fimH | |||||||
| Mexico | 1986, 1987 | Tlaltizapan 1, Mor. | O9:NM | A | 5 | − | 5 | 1 | − | 3 | − | − | 4 | STEC |
| 1986 | O9:NM | 1 | − | − | − | 1 | 1 | − | − | 1 | EAEC | |||
| O9:H9 | 2 | − | 2 | − | 2 | − | 2 | − | 2 | STEC/EAEC | ||||
| O9:H10 | 1 | − | 1 | − | 1 | − | − | − | 1 | STEC/EAEC | ||||
| 1987 | O9:H11 | B1 | 2 | − | 2 | − | − | - | − | 2 | 2 | STEC | ||
| 1986 | O9:NM | C | 2 | − | 2 | 2 | − | 2 | − | − | 2 | STEC | ||
| 1996 | ** IMSS | O9:H4 | A | 1 | − | 1 | − | − | - | − | − | 1 | STEC | |
| O9:H33 | 2 | 2 | 2 | − | − | - | − | 2 | 2 | STEC | ||||
| O9:H4 | 3 | − | 3 | − | 3 | 2 | 1 | − | 3 | STEC/EAEC | ||||
| O9:H33 | 2 | 2 | − | − | − | - | − | 2 | 2 | a-EPEC | ||||
| O9:NM | 1 | − | 1 | − | 1 | - | − | − | 1 | STEC/EAEC | ||||
| O9:H21 | B1 | 1 | − | − | 1 | − | - | − | − | 1 | ND | |||
| 2000 | O9:H25 | 3 | − | 3 | − | 3 | − | − | − | 3 | STEC/EAEC | |||
| O9:H25 | 4 | − | − | 2 | 4 | − | − | − | 4 | EAEC | ||||
| Egypt | 1997 | Egypt | O9:NM | B2 | 1 | − | − | − | 1 | - | − | − | 1 | EAEC |
| O9:NM | A | 1 | 1 | 1 | 1 | STEC/EAEC | ||||||||
| 1999 | O9:NM | A | 1 | − | − | − | 1 | - | − | − | 1 | EAEC | ||
| O9:H9 | 1 | − | − | − | 1 | - | − | − | 1 | EAEC | ||||
| N (%) | 34 | 4 (12) | 23 (68) | 6 (18) | 19 (56) | 8 (24) | 3 (9) | 6 (18) | 33 (97) | |||||
1 Cravioto A, [20]. * 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-. All O9 strains were negative for stx2 and aaiC. ** IMSS: Instituto Mexicano del Seguro Social (Mexican Institute of Social Security).