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Characterization of new recombinant noroviruses ArchiMer
Ambert Balay, K; Bon, F; Le Guyader, Soizick; Pothier, P; Kohli, E.
Noroviruses are important etiologic agents of acute gastroenteritis and show great genetic diversity. To characterize more fully previously detected strains that could not be assigned unequivocally to one particular genotype based on the RNA polymerase, we have sequenced a region in the capsid gene and, in some cases, in the junction between open reading frame 1 (ORF1) and ORF2. The results allowed us to identify several recombinant noroviruses: GGHb viruses were detected for the first time in France in August 2000 and then spread through France and to Europe during the following winter. Here we present the characterization of three other probable GII recombinants which showed different phylogenetic positions depending on their ORF1 and ORF2 sequences....
Tipo: Text Palavras-chave: Genogroup; RNA recombination; Gastroenteritis; Round structured virus; Reverse transcription; Norovirus.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-1234.pdf
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Molecular epidemiology of caliciviruses detected in sporadic and outbreak cases of gastroenteritis in France from December 1998 to February 2004 ArchiMer
Bon, Fabienne; Ambert Balay, K; Giraudon, H; Kaplon, J; Le Guyader, Soizick; Pommepuy, Monique; Gallay, A; Vaillant, V; De Valk, H; Chikhi Brachet, R; Flahaut, A; Pothier, P; Kohli, E.
We compiled sequence and epidemiological data from 172 caliciviruses detected in France from December 1998 to February 2004 in sporadic and outbreak cases. The results showed a cocirculation of strains with a majority of genogroup II (GII) noroviruses. Three groups of noroviruses, not detected before in our laboratory, emerged and spread during the period: the recombinant GGIIb and Norwalk-related strains not amplified in the polymerase gene in 2000 and a new Lordsdale variant in 2002. We observed that (I) GII4 noroviruses were predominant in nursing home and hospital outbreaks but rare in oyster- and water-related outbreaks despite continuous circulation in the population; (ii) at the opposite, genogroup I strains were detected in the majority of...
Tipo: Text Palavras-chave: Genogroup; Cocirculation; Gastroenteritis; Caliciviruses; Epidemiological.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-723.pdf
Registros recuperados: 2
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