l forms were more resistant than the parent gonococcus to penicillin , ampicillin , methicillin , cycloserine , and cephalothin , whereas both organisms had similar sensitivities to bacitracin , vancomycin , ristocetin , novobiocin , tetracycline , and erythromycin .
C0030842
penicillin
C0025643
methicillin