results with a variety of media -- for gram-negative bacilli tested with ampicillin , carbenicillin , cephaloridine , and gentamicin , staphylococci with penicillin , cloxacillin , fusidic acid , and gentamicin , and streptococci with penicillin , ampicillin , cephaloridine , and erythromycin -- were usually very similar to those of agar dilution tests .
C0006976
carbenicillin
C0030842
penicillin