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Table 3 Prevalence of Shiga toxin genes among the STEC O157 isolates

From: Multiple antibiotic resistances among Shiga toxin producing Escherichia coli O157 in feces of dairy cattle farms in Eastern Cape of South Africa

Serogroup stx1 stx2 Prevalence of Shiga toxin genes
O157 (N = 84) + - 37 (44 %)
  - + 38 (45.3 %)
  + + 9 (10.7 %)