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  • Title: Genetic diversity of G9P[8] rotavirus strains circulating in Italy in 2007 and 2010 as determined by whole genome sequencing.
    Author: Ianiro G, Heylen E, Delogu R, Zeller M, Matthijnssens J, Ruggeri FM, Van Ranst M, Fiore L.
    Journal: Infect Genet Evol; 2013 Jun; 16():426-32. PubMed ID: 23542095.
    Abstract:
    This study reports the molecular characterization of G9P[8] rotavirus strains from children with acute diarrhea identified in different cities of Italy, in 2007 and 2010. Seventeen samples exhibited a G9P[8] genotype by RT-PCR and semi-nested PCR. Preliminary sequence analysis of the VP7 and VP8(*) encoding genes revealed nucleotide identities ranging between 96% and 100%. Full genome sequencing of four G9P[8] strains selected in different cities or years showed that the investigated Italian strains possessed a complete Wa-like genotype constellation. However, phylogenetic analyses assigned strains to different clusters reflecting point mutations and possibly earlier reassortment between Wa-like RVA strains. Deduced amino acid sequence of the VP7 and VP4 genes for the G9P[8] strains revealed at least five substitutions in relevant antigenic sites of both proteins.
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