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  • Title: T serotyping and genomic profile of erythromycin-resistant or -sensitive Streptococcus pyogenes isolated in Campania Region, Italy.
    Author: Catalanotti P, Catania MR, Lucido M, Martini S, Gallè F, Ortega De Luna L, Rossano F.
    Journal: J Chemother; 2005 Apr; 17(2):131-7. PubMed ID: 15920897.
    Abstract:
    Streptococcus pyogenes causes mild infections, such as pharyngitis, and severe infections, such as necrotizing fascitis. In recent years, erythromycin-resistant strains of S. pyogenes have been reported in many countries. In some areas of Italy, increased rates of erythromycin resistance were first observed in the mid-1990s. Here, we report epidemiological T serotyping, invasiveness, erythromycin resistance, and PFGE patterns of 99 S. pyogenes strains isolated at the Laboratory of Clinical Microbiology of the Second University of Naples, Italy. Regarding T serotyping, 26 of 99 strains were W+, 16 strains were U+, 16 were X+, and 14 were agglutinated by anti T serum. A low percentage revealed Y+. Twelve strains were not T serotyped. PFGE patterns showed species polymorphism; however, inside the various serotypes, we demonstrated a fair homogeneity. No correlation among invasiveness and T serotype or PFGE pattern has been shown. Twenty-two of 99 strains were erythromycin-resistant.
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