Urine bactericidal activity against Escherichia coli isolates exhibiting different resistance phenotypes/genotypes in an in vitro pharmacodynamic model simulating urine concentrations obtained after oral administration of a 400-milligram single dose of cefditoren-pivoxil

Antimicrob Agents Chemother. 2008 Mar;52(3):1184-6. doi: 10.1128/AAC.01247-07. Epub 2007 Dec 26.

Abstract

Activity of simulated cefditoren urinary concentrations was determined against seven Escherichia coli isolates. Bactericidal activity was obtained from 4 to 24 h against TEM-1 (penicillinase production/hyperproduction), TEM-34 (IRT-6), and TEM-116 (extended-spectrum beta-lactamase [ESBL]) and from 6 to 8 h against SHV/TEM-116 (ESBL) but never against SHV/TEM-1 (ESBL). Extension of bactericidal activity depended on the resistance genotype/phenotype tested.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amdinocillin Pivoxil* / administration & dosage
  • Amdinocillin Pivoxil* / pharmacokinetics
  • Amdinocillin Pivoxil* / pharmacology
  • Anti-Bacterial Agents* / administration & dosage
  • Anti-Bacterial Agents* / pharmacokinetics
  • Anti-Bacterial Agents* / pharmacology
  • Anti-Infective Agents, Urinary* / administration & dosage
  • Anti-Infective Agents, Urinary* / pharmacokinetics
  • Anti-Infective Agents, Urinary* / pharmacology
  • Cephalosporins* / administration & dosage
  • Cephalosporins* / pharmacokinetics
  • Cephalosporins* / pharmacology
  • Escherichia coli / drug effects*
  • Escherichia coli / enzymology
  • Escherichia coli / genetics
  • Escherichia coli / isolation & purification
  • Escherichia coli Infections / microbiology
  • Genotype
  • Humans
  • Microbial Sensitivity Tests
  • Models, Biological
  • Phenotype
  • Urinary Tract Infections / microbiology
  • Urine / chemistry*
  • Urine / microbiology
  • beta-Lactamases / biosynthesis

Substances

  • Anti-Bacterial Agents
  • Anti-Infective Agents, Urinary
  • Cephalosporins
  • Amdinocillin Pivoxil
  • cefditoren
  • beta-Lactamases