minimal inhibitory concentrations ( mics ) of six beta-lactam antibiotics ( ampicillin , cephaloridine , cephalexine , cefazoline , cefuroxime , cefotaxime ) were determined on 90 non beta-lactamase producing and 94 beta-lactamase producing strains by a miniaturized dilution method . beta-lactamase production transfer and antibiotic resistance transfer were observed in a receiving e. coli k12 c600 na- after conjugation with 94 producing strains .
C0007562
cefuroxime
C0007554
cefotaxime