In vitro evaluation of cefdinir (FK482), a new oral cephalosporin with enhanced antistaphylococcal activity and beta-lactamase stability

• Published in: Diagnostic microbiology and infectious disease Vol. 18; no. 1; p. 31
• Main Authors: Cohen, M A, Joannides, E T, Roland, G E, Meservey, M A, Huband, M D, Shapiro, M A, Sesnie, J C, Heifetz, C L
• Format: Journal Article
• Language: English
• Published: United States 01-01-1994
• Subjects: Bacteria - drug effects; Bacteria - growth & development; beta-Lactamases - metabolism; Cefdinir; Cephalosporins - pharmacology; Enterobacteriaceae - drug effects; Enzyme Stability; Microbial Sensitivity Tests; Neisseria gonorrhoeae - drug effects; Staphylococcus - drug effects; Staphylococcus - enzymology; Staphylococcus - growth & development; Streptococcus - drug effects
• ISSN: 0732-8893
• DOI: 10.1016/0732-8893(94)90131-7

Cefdinir (FK482), a new oral cephalosporin with enhanced beta-lactamase stability, was tested by microbroth dilution against respiratory, urogenital, and skin and skin-structure bacterial pathogens. Included were beta-lactamase (beta LAC)-producing and -nonproducing isolates. Activity was compared with that of other orally administered beta-lactams. Cefdinir minimum inhibitory concentrations for 90% of isolates MIC90s (microgram/ml) were < or = 0.5 versus beta LAC+/oxacillin-susceptible Staphylococcus, aureus, S. epidermidis, and S. saprophyticus; < or = 0.06 versus Streptococcus groups A and B, and Neisseria gonorrhoeae beta LAC+; 0.125 versus S. pneumoniae penicillin-susceptible and Proteus mirabilis beta LAC+; 0.25 versus beta LAC+ versus strains of Moraxella catarrhalis, Escherichia coli, Klebsiella pneumoniae, and K. oxytoca; 0.5 versus Haemophilus influenzae beta LAC-; 1 versus H. influenzae beta LAC+; 4 versus Legionella pneumophila beta LAC+; and 8 versus Enterococcus faecalis beta LAC-strains. Cefdinir was equally effective against both standard and high inocula of S. aureus strains producing A, B, C, or D beta LAC types. MICs were also generated versus quality-control reference strains.