both antibiotics were well tolerated . minimal inhibiting concentrations ( mics ) of cefaclor , amoxicillin , cephradine , and cephalexin were determined by an agar dilution technique for the 44 available pretreatment isolates ( 41 escherichia coli and 3 proteus mirabilis ) .
C0007738
cephradine
C0007716
cephalexin