Fig. 3From: Multiple antibiotic resistances among Shiga toxin producing Escherichia coli O157 in feces of dairy cattle farms in Eastern Cape of South AfricaAgarose gel image of amplicons obtained from PCR with primers designed for bla-ampC resistance gene of E. coli isolates recovered from this study. Lane 1 is molecular size markers (100 bp), lane 2 is negative control (PCR mix without DNA) while lanes 3 to 18 are bla-ampC (198 bp) gene from O157 strains isolated in this studyBack to article page