antimicrobial agents tested were penicillin g ( pc-g ) , ampicillin ( ab-pc ) , cephaloridine ( cer ) , erythromycin ( em ) , josamycin ( jm ) , lincomycin ( lcm ) , clindamycin ( cldm ) , chloramphenicol ( cp ) and tetracycline ( tc ) .
C1136254
antimicrobial agents
C0014806
erythromycin