Streptococcus agalactiae highly resistant to fluoroquinolones

Elisenda Miró, Montserrat Rebollo, Alba Rivera, M. Teresa Álvarez, Ferrán Navarro, Beatriz Mirelis, Pere Coll

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)


BACKGROUND. Streptococcus agalactiae remains susceptible to penicillin; nevertheless, an increase in the resistance to other antimicrobial families, such as macrolides and more rarely fluoroquinolones, has been described. METHODS AND RESULTS. From 2003 to 2004, two fluoroquinolone-resistant S. agalactiae strains were detected. The strains presented one mutation in parC (Ser 79 → Phe) and an additional mutation in gyrA (Glu 85 → Ala or Glu 85 → Lys). CONCLUSION. This study describes the first S. agalactiae strains highly resistant to fluoroquinolones in Spain.
Original languageEnglish
Pages (from-to)562-563
JournalEnfermedades Infecciosas y Microbiologia Clinica
Publication statusPublished - 1 Jan 2006


  • Fluoroquinolones
  • Streptococcus agalactiae
  • gyrA
  • parC


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