the isolates tested showed a high level of resistance to ampicillin ( ap ) ( 90.4 % ) , piperacillin ( pip ) ( 89.0 % ) , tetracycline ( tc ) ( 88.7 % ) , streptomycin ( sm ) ( 87.7 % ) , chloramphenicol ( cm ) ( 78.4 % ) , kanamycin ( km ) ( 72.6 % ) and sulfamethoxazole/trimethoprim ( sxt ) ( 54.2 % ) .
C0002680
ampicillin
C0031955
piperacillin