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| Le Guyader, Soizick; Le Saux, Jean-claude; Ambert-balay, Katia; Krol, Joanna; Serais, Ophelie; Parnaudeau, Sylvain; Giraudon, Helene; Delmas, Gilles; Pommepuy, Monique; Pothier, Pierre; Atmar, Robert L.. |
| Following a flooding event close to a shellfish production lagoon, 205 cases of gastroenteritis were linked to oyster consumption. Twelve stool samples from different individuals were collected. Analysis showed that eight samples were positive for multiple enteric viruses, and one stool sample had seven different enteric viruses. Analysis of shellfish implicated in the outbreak allowed detection of the same diversity of enteric viruses, with some viral genomic sequences being identical to those obtained from stool sample analysis. Shellfish were contaminated by as many as five different enteric viruses. For the first time in Europe, Aichi virus was identified in oyster samples. Shellfish samples collected over 3 weeks following the outbreak showed a... |
| Tipo: Text |
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| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-6099.pdf |
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| Luz Vilarino, M.; Le Guyader, Soizick; Polo, David; Schaeffer, Julien; Krol, Joanna; Romalde, Jesus L.. |
| Standard and real-time reverse transcription-PCR (rRT-PCR) procedures were used to monitor cultured and wild bivalve molluscs from the Ria de Vigo (NW Spain) for the main human enteric RNA viruses, specifically, norovirus (NoV), hepatitis A virus (HAV), astrovirus (AsV), rotavirus (RT), enterovirus (EV), and Aichi virus (AiV). The results showed the presence of at least one enteric virus in 63.4% of the 41 samples analyzed. NoV GII was the most prevalent virus, detected in 53.7% of the samples, while NoV GI, AsV, EV, and RV were found at lower percentages (7.3, 12.2, 12.2, and 4.9%, respectively). In general, samples obtained in the wild were more frequently contaminated than those from Cultured (70.6 vs. 58.3%) molluscs and were more readily contaminated... |
| Tipo: Text |
Palavras-chave: Seafood industry; Viral quantification; Viral prevalence; Norovirus; Hepatitis A virus; Enteric viruses; Molluscs. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6957.pdf |
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| Le Guyader, Soizick; Krol, Joanna; Ambert-balay, Katia; Ruvoen-clouet, Nathalie; Desaubliaux, Benedicte; Parnaudeau, Sylvain; Le Saux, Jean-claude; Ponge, Agnes; Pothier, Pierre; Atmar, Robert L.; Le Pendu, Jacques. |
| Noroviruses have been recognized to be the predominant agents of nonbacterial gastroenteritis outbreaks in humans, and their transmission via contaminated shellfish consumption has been demonstrated. Norovirus laboratory experiments, volunteer challenge studies, and community gastroenteritis outbreak investigations have identified human genetic susceptibility factors related to histo-blood group antigen expression. Following a banquet in Brittany, France, in February 2008, gastroenteritis cases were linked to oyster consumption. This study identified an association of the norovirus illnesses with histo-blood group expression, and oyster contamination with norovirus was confirmed by qualitative and quantitative analyses. The secretor phenotype was... |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00002/11309/8050.pdf |
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| Butot, Sophie; Le Guyader, Soizick; Krol, Joanna; Putallaz, Thierry; Amoroso, Richard; Sanchez, Gloria. |
| Human noroviruses (NoVs) are the most common viruses causing acute gastroenteritis in humans. Performance characteristics of two commercial quantitative NoV RT-PCR assays, the Norovirus real-time RT-PCR Kit (AnDiaTec) and the Type I and Type II kits (Generon), and the international assay as selected by the CEN/TC/WG6/TAG4 group were evaluated for the specific detection and quantitation of 59 NoV samples, including different subtypes of NoV genogroup I and II. The results showed that the method proposed by the CEN/TC/WG6/TAG4 group was 100% specific since it was able to detect all samples tested. The commercialized kits evaluated failed to detect a vast majority of NoV GI strains. Additionally the Generon kit did not succeed to detect strains from GII.3,... |
| Tipo: Text |
Palavras-chave: Norovirus; Real-time RT-PCR; Commercial kit. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00006/11760/8473.pdf |
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| Le Saux, Jean-claude; Serais, Ophelie; Krol, Joanna; Parnaudeau, Sylvain; Salvagnac, P.; Delmas, G.; Cicchelero, V.; Claudet, J.; Pothier, P.; Balay, K.; Fiandrino, Annie; Pommepuy, Monique; Le Guyader, Soizick. |
| Infectious diseases linked to the consumption of raw shellfish have long been identified. Over the past century, various strategies have been set up in shellfish growing areas throughout the world to guarantee the sanitary quality of shellfish and to protect consumers. However despite sanitary improvements, human enteric viruses - especially Hepatitis A virus and norovirus– have been found to be associated with shellfish outbreaks. A recent example demonstrated the impact of storm events. Following heavy rain and sewage overflow, shellfish beds were contaminated and the shellfish from them were marketed after depuration. However, since viruses persist longer than fecal contamination indicator bacteria, several clusters of gastroenteritis cases were... |
| Tipo: Text |
Palavras-chave: Virus; Shellfish; Contamination events. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00066/17736/15257.pdf |
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