Beta-lactam failure in treatment of two group G Streptococcus dysgalactiae subsp. equisimilis Pharyngitis patients

J Clin Microbiol. 2008 Feb;46(2):814-6. doi: 10.1128/JCM.00985-07. Epub 2007 Dec 5.

Abstract

We present two cases of exudative pharyngitis due to Streptococcus dysgalactiae subsp. equisimilis, Lancefield group G. While the participation of this organism as an agent of pharyngitis is well documented, we focus on failure of beta-lactam therapy, a phenomenon that is well described for pharyngitis due to Streptococcus pyogenes. Therefore, these case reports add to our knowledge of pharyngitis caused by non-S. pyogenes streptococci.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Amoxicillin / therapeutic use*
  • Anti-Bacterial Agents / therapeutic use*
  • Clarithromycin / therapeutic use
  • Female
  • Humans
  • Male
  • Microbial Sensitivity Tests
  • Pharyngitis / drug therapy*
  • Pharyngitis / microbiology
  • Streptococcal Infections / drug therapy*
  • Streptococcal Infections / microbiology
  • Streptococcus / classification
  • Streptococcus / drug effects
  • Streptococcus / isolation & purification*
  • Treatment Outcome
  • beta-Lactam Resistance*

Substances

  • Anti-Bacterial Agents
  • Amoxicillin
  • Clarithromycin