We found a 13% macrolide resistance in 3,866 Streptococcus pyogenes isolated from tonsillopharyngitis patients; 59% macrolide-resistant isolates were distributed in 5 clones, suggesting the importance of both resistance gene transfer and clonal dissemination in the spread of these organisms. We also report one of the largest collections of telithromycin-resistant isolates.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3367575PMC
http://dx.doi.org/10.3201/eid1106.041247DOI Listing

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