the sensitivity of four groups of gonococcal strains to ampicillin ( am ) , penicillin ( p ) , tetracycline ( t ) , rifampicin ( ri ) , spectinomycin ( sp ) , sulphamethoxazole ( su ) , trimethoprim ( tr ) , and a combination of su and tr in the ratio 5:1 ( su/tr 5:1 ) has been determined .
C0018081
gonococcal
C0039644
tetracycline