stored data on the inhibition zone diameters of 2274 strains of escherichia coli that had been determined during the first five investigation periods ( 1975 to 1977 ) of the arbeitsgemeinschaft `` '' resistenz '' '' using the standard disc susceptibility test on mueller-hinton agar , were evaluated for : ( 1 ) frequency of secondary resistance to ampicillin , carbenicillin , cephalothin , chloramphenicol , kanamycin , nitrofurantoin , streptomycin , sulfamethoxazole , tetracycline , and trimethoprim-sulfamethoxazole on the basis of statistically defined break points ;
C0038689
, sulfamethoxazo
C0041044
trimethoprim-sulfamethoxazo