Figure 2. . Comparison of antimicrobial resistance frequencies between Shiga toxin–producing Escherichia coli (STEC) and other E. coli. Of isolates from cattle, resistance frequencies were similar between STEC and other E. coli (A). In contrast, of isolates from humans, resistance frequencies were generally lower for STEC compared with other E. coli (B). Am, ampicillin; Cx, cefoxitin; C, chloramphenicol; Frx, ceftriaxone; Smx, sulfamethoxazole; Cf, cephalothin; Gm, gentamicin; NA, nalidixic acid; Cip, ciprofloxacin; Fur, ceftiofur; Te, tetracycline; T/S, trimethoprim-sulfamethoxazole; A/C, amoxicillin-clavulanic acid; Str, streptomycin.