title: In vitro activity of cefodizime (HR-221).
abstract: The in vitro activity of cefodizime (HR-221), a new cephalosporin antibiotic, was compared with the activities of selected antimicrobial agents against a broad spectrum of aerobic bacteria. Cefodizime concentrations of 2 micrograms/ml inhibited about 90% of Enterobacteriaceae studied. Serratia marcescens required 8 micrograms/ml to inhibit 90% of strains. Among gram-positive cocci, 50% of strains were inhibited by 2 micrograms/ml of cefodizime (including methicillin-resistant Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus faecalis, and penicillin-resistant Streptococcus pneumoniae). Pseudomonas aeruginosa was less susceptible to cefodizime. Cefotaxime, an antibiotic closely related to cefodizime structurally, was about fourfold more active.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects*; D001424:Bacterial Infections / Q000382:microbiology; D002439:Cefotaxime / Q000031:analogs & derivatives* / Q000494:pharmacology; D004352:Drug Resistance, Microbial; D004755:Enterobacteriaceae / Q000187:drug effects; D006801:Humans; D008826:Microbial Sensitivity Tests
chemical_list: D000900:Anti-Bacterial Agents; D002439:Cefotaxime; C033356:cefodizime