the susceptibility of s. johannesburg strains isolated in a 5-year period from 1973 to 1977 to eight antimicrobial drugs including ampicillin ( a ) , streptomycin ( s ) , tetracycline ( t ) , chloramphenicol ( c ) , kanamycin ( k ) , sulphadiazine ( su ) , trimethoprim ( tm ) and gentamicin ( g ) was tested by the agar dilution method .
C1136254
antimicrobial drugs
C0039644
tetracycline