Mutations in 23S rRNA confer resistance against azithromycin in Pseudomonas aeruginosa

Antimicrob Agents Chemother. 2012 Aug;56(8):4519-21. doi: 10.1128/AAC.00630-12. Epub 2012 May 29.

Abstract

The emergence of antibiotic-resistant Pseudomonas aeruginosa is an important concern in the treatment of long-term airway infections in cystic fibrosis patients. In this study, we report the occurrence of azithromycin resistance among clinical P. aeruginosa DK2 isolates. We demonstrate that resistance is associated with specific mutations (A2058G, A2059G, and C2611T in Escherichia coli numbering) in domain V of 23S rRNA and that introduction of A2058G and C2611T into strain PAO1 results in azithromycin resistance.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anti-Bacterial Agents / pharmacology*
  • Azithromycin / pharmacology*
  • Cystic Fibrosis / microbiology
  • Drug Resistance, Bacterial / genetics
  • Humans
  • Microbial Sensitivity Tests
  • Mutation
  • Point Mutation
  • Pseudomonas Infections / complications
  • Pseudomonas Infections / drug therapy
  • Pseudomonas Infections / microbiology
  • Pseudomonas aeruginosa / drug effects*
  • Pseudomonas aeruginosa / genetics*
  • Pseudomonas aeruginosa / isolation & purification
  • RNA, Bacterial / genetics
  • RNA, Ribosomal, 23S / genetics*

Substances

  • Anti-Bacterial Agents
  • RNA, Bacterial
  • RNA, Ribosomal, 23S
  • Azithromycin