cefaclor was substantially more active against staphylococci , streptococci , gonococci , meningococci , haemophilus , escherichia coli , klebsiella pneumoniae , citrobacter diversus , proteus mirabilis , salmonellae , and shigellae than was cephalexin , which in turn was more active than cephradine .
C0007537
cefaclor
C0007716
cephalexin