title: Cyclacillin: in vitro activity against aerobic and anaerobic bacteria.
abstract: Cyclacillin at 50 microgram/ml inhibited streptococci (100%), shigella (72%), and Bacteroides (B) fragilis ss fragilis (84%). At 100 microgram/ml it inhibited proteus (75%), B. fragilis (86%), and E. coli (50%). Cyclacillin was more effective than ampicillin against beta-lactamase-producing H. influenzae. The activity of cyclacillin was found to be more enhanced when tested in nutrient agar and Mueller-Hinton agar than in brain heart infusion agar.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects*; D001441:Bacteroides fragilis / Q000187:drug effects; D003493:Cyclacillin / Q000494:pharmacology*; D004926:Escherichia coli / Q000187:drug effects; D006193:Haemophilus influenzae / Q000187:drug effects / Q000201:enzymology; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology*; D001618:beta-Lactamases / Q000096:biosynthesis
chemical_list: D010406:Penicillins; D003493:Cyclacillin; D000667:Ampicillin; D001618:beta-Lactamases