TABLE 1.

Frequency of STEC among several E. coli serogroups isolated from patients with diarrheal disease in São Paulo, Brazil, from 1976 to 1999

SerogroupaNo. of strains studiedNo. (%) of STEC strains
O262054 (1.95)
O552091 (0.48)
O11180221 (2.61)
O113160
O1193050
O157151 (6.67)
ND1,0552 (0.19)
Total2,60729 (1.1%)
  • a ND, undetermined (not belonging to the EPEC, EIEC, and ETEC categories).