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  • Title: Resistance to macrolides in Streptococcus pyogenes in France in pediatric patients.
    Author: Bingen E, Fitoussi F, Doit C, Cohen R, Tanna A, George R, Loukil C, Brahimi N, Le Thomas I, Deforche D.
    Journal: Antimicrob Agents Chemother; 2000 Jun; 44(6):1453-7. PubMed ID: 10817692.
    Abstract:
    A total of 1,500 recent throat isolates of Streptococcus pyogenes collected between 1996 and 1999 from children throughout France were tested for their susceptibility to erythromycin, azithromycin, josamycin, clindamycin, and streptogramin B. The erythromycin-resistant isolates were further studied for their genetic mechanism of resistance, by means of PCR. The clonality of these strains was also investigated by means of serotyping and ribotyping. In all, 6.2% of the strains were erythromycin resistant, and 3.4 and 2.8% expressed the constitutive MLS(B) and M resistance phenotypes and harbored the ermB and mefA genes, respectively; ermTR was recovered from one isolate which also harbored the ermB gene. Ten serotypes and 8 ribotypes were identified, but we identified 17 strains by combining serotyping with ribotyping. Among the eight ribotypes, the mefA gene was recovered from six clusters, one being predominant, while the ermB gene was recovered from four clusters, of which two were predominant.
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