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Isolation of Translating Ribosomes Containing Peptidyl-tRNAs for Functional and Structural Analyses
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Isolation of Translating Ribosomes Containing Peptidyl-tRNAs for Functional and Structural Analyses

Published on: February 25, 2011

Mutations in ribosomal proteins and ribosomal RNA confer macrolide resistance in human Ureaplasma spp

Li Xiao1, Donna M Crabb, Lynn B Duffy

  • 1Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35249, USA.

International Journal of Antimicrobial Agents
|March 1, 2011
PubMed

Insights

Genetic mutations in 23S rRNA and ribosomal protein L4 likely cause macrolide resistance in Ureaplasma species. This resistance was uncommon, unlike widespread tetracycline resistance observed in the study.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Antimicrobial Resistance

Background:

  • Ureaplasma species are common human commensals, but can cause opportunistic infections.
  • Macrolide antibiotics are crucial for treating Ureaplasma infections.
  • Understanding macrolide resistance mechanisms is vital for effective treatment strategies.

Purpose of the Study:

  • Investigate the genetic basis of macrolide resistance in Ureaplasma isolates.
  • Determine the prevalence of macrolide resistance compared to tetracycline resistance.

Main Methods:

  • Analyzed six Ureaplasma isolates with high erythromycin minimum inhibitory concentrations (MICs).
  • Examined point mutations in domain V of 23S ribosomal RNA (rRNA).
  • Sequenced ribosomal protein L4 genes for mutations.

Main Results:

  • Point mutations in 23S rRNA domain V and/or ribosomal protein L4 genes were identified as probable causes of macrolide resistance.
  • Macrolide resistance was found to be uncommon in the studied isolates.
  • Tetracycline resistance was highly prevalent, affecting 33% of isolates.

Conclusions:

  • Genetic mutations in specific rRNA and ribosomal protein genes are key drivers of macrolide resistance in Ureaplasma.
  • The low prevalence of macrolide resistance contrasts sharply with the high rate of tetracycline resistance.
  • Findings highlight the need for ongoing surveillance of antimicrobial resistance patterns in Ureaplasma.

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