Minimum inhibitory concentration of carbapenems and tigecycline against Salmonella spp

J Med Microbiol. 2009 Mar;58(Pt 3):337-341. doi: 10.1099/jmm.0.47853-0.

Abstract

Antimicrobial resistance in Salmonella spp. is of grave concern, more so in quinolone-resistant and extended-spectrum beta-lactamase (ESBL)-producing isolates that cause complicated infections. The MIC of azithromycin, ciprofloxacin, cefixime, cefepime, ceftriaxone, gatifloxacin, imipenem, levofloxacin, meropenem and ofloxacin (E-test strip) and tigecycline and faropenem (agar dilution) against 210 Salmonella spp. was determined. MIC(90) (defined as the antimicrobial concentration that inhibited growth of 90 % of the strains) of the carbapenems (imipenem and meropenem) for Salmonella Typhi and Salmonella Paratyphi A was 0.064 microg ml(-1). MIC(90) of faropenem was 0.25 microg ml(-1) for S. Typhi, S. Paratyphi A and Salmonella Typhimurium. The MIC(90) of azithromycin for all Salmonella spp. ranged from 8 to 16 microg ml(-1). Tigecycline showed an MIC(90) of 2 microg ml(-1) for S. Typhi, 1 microg ml(-1) for S. Paratyphi A and 4 microg ml(-1) for S. Typhimurium. We concluded that tigecycline and the carbapenems are likely to have roles in the final stage of treatment of quinolone-resistant and ESBL-producing multidrug-resistant salmonellae.

MeSH terms

  • Anti-Bacterial Agents / pharmacology*
  • Bacteremia / microbiology*
  • Carbapenems / pharmacology*
  • Drug Resistance, Bacterial
  • Humans
  • Microbial Sensitivity Tests
  • Minocycline / analogs & derivatives*
  • Minocycline / pharmacology
  • Quinolones / pharmacology
  • Salmonella / drug effects*
  • Salmonella / isolation & purification
  • Salmonella Infections / microbiology*
  • Tigecycline
  • Typhoid Fever / microbiology

Substances

  • Anti-Bacterial Agents
  • Carbapenems
  • Quinolones
  • Tigecycline
  • Minocycline