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Frequency of STEC among several E. coli serogroups isolated from patients with diarrheal disease in São Paulo, Brazil, from 1976 to 1999
| Serogroupa | No. of strains studied | No. (%) of STEC strains |
|---|---|---|
| O26 | 205 | 4 (1.95) |
| O55 | 209 | 1 (0.48) |
| O111 | 802 | 21 (2.61) |
| O113 | 16 | 0 |
| O119 | 305 | 0 |
| O157 | 15 | 1 (6.67) |
| ND | 1,055 | 2 (0.19) |
| Total | 2,607 | 29 (1.1%) |
ND, undetermined (not belonging to the EPEC, EIEC, and ETEC categories).
