Antimicrobial activity of LY163892, an orally administered 1-carbacephem

Abstract
LY163892 was found to be similar to cefaclor and slightly superior to cephalexin in antimicrobial activity and spectrum. Bacteria with MIC50 ≤8.0 mg/l included Escherichia coli, Kiebsiella spp., Proteus mirabilis, Citrobacter diversus, Haemophilus influenzae, Branhamella catarrhalis, pathogenic Neisseria spp., oxacillin-susceptible staphylococci, and Streptococcus spp. Strains that produced plasmid-mediated β-lactamases generally remained susceptible to LY163892. LY163892 was found to be bactericidal in general, but its MICs for some bacterial strains were adversely affected by increased inocula.