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  • Title: Increase of the M phenotype among erythromycin-resistant Streptococcus pneumoniae isolates from Spain related to the serotype 14 variant of the Spain9V-3 clone.
    Author: Ardanuy C, Fenoll A, Berrón S, Calatayud L, Liñares J.
    Journal: Antimicrob Agents Chemother; 2006 Sep; 50(9):3162-5. PubMed ID: 16940119.
    Abstract:
    Between 1998 and 2003 the rate of erythromycin resistance among pneumococci in Spain was 34.4%. Although the MLS(B) phenotype was prevalent (94.7%), the rate of the M phenotype increased from 3.3% to 8.9% (P < 0.01). Clonal dissemination of mef(E)-carrying strains of serotype 14 variant of the Spain(9V)-3 clone was the major contributor to this increase.
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