title: Telithromycin susceptibility and genomic diversity of macrolide-resistant serotype III group B streptococci isolated in perinatal infections.
abstract: We studied the telithromycin, erythromycin, azithromycin, and clindamycin susceptibilities of serotype III macrolide-resistant group B streptococci, together with genetic mechanisms of resistance and genomic diversity. ermB, ermA, and mefA were found in, respectively, 57, 32, and 9% of isolates. The telithromycin MIC at which 90% of isolates were inhibited was 0.5 micro g/ml. Macrolide resistance was associated with dissemination of resistance determinants among isolates of different genetic backgrounds.
authors.affiliation: Laboratoire d'Etudes de Génétique Bactérienne dans les Infections de l'Enfant (EA3105), Service de Microbiologie, Hôpital Robert Debré (AP-HP), Université Denis Diderot-Paris 7, 75019 Paris, France. edouard.bingen@rdb.ap-hop-paris.fr
authors.forename: Edouard
authors.initials: E
authors.lastname: Bingen
authors.forename: Catherine
authors.initials: C
authors.lastname: Doit
authors.forename: Philippe
authors.initials: P
authors.lastname: Bidet
authors.forename: Naima
authors.initials: N
authors.lastname: Brahimi
authors.forename: Dominique
authors.initials: D
authors.lastname: Deforche
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001426:Bacterial Proteins / Q000235:genetics; D024881:Drug Resistance, Bacterial; D004917:Erythromycin / Q000494:pharmacology; D005260:Female; D005798:Genes, Bacterial / Q000235:genetics; D006801:Humans; D007231:Infant, Newborn; D048628:Ketolides; D018942:Macrolides / Q000494:pharmacology*; D008565:Membrane Proteins / Q000235:genetics; D008780:Methyltransferases / Q000235:genetics; D008826:Microbial Sensitivity Tests; D011247:Pregnancy; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013290:Streptococcal Infections / Q000382:microbiology*; D013292:Streptococcus agalactiae / Q000187:drug effects* / Q000235:genetics*
chemical_list: D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; D048628:Ketolides; D018942:Macrolides; C117866:MefA protein, Streptococcus; D008565:Membrane Proteins; D004917:Erythromycin; D008780:Methyltransferases; C431709:ErmA protein, Bacteria; C035181:rRNA (adenosine-O-2'-)methyltransferase; C106791:telithromycin