Consulta: creatorFacets:"De Valk, H"
Registros recuperados: 2
Data/hora: 07/06/2024 00:55:26

Molecular epidemiology of caliciviruses detected in sporadic and outbreak cases of gastroenteritis in France from December 1998 to February 2004
Provedor de dados: 5
Autores: 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

A large multi-pathogen waterborne community outbreak linked to faecal contamination of a groundwater system, France, 2000
Provedor de dados: 5
Autores: Gallay, A; De Valk, H; Cournot, M; Ladeuil, B; Hemery, C; Castor, C; Bon, F; Megraud, F; Le Cann, Pierre; Desenclos, Jc.
A large waterborne outbreak of infection that occurred during August 2000 in a local community in France was investigated initially via a rapid survey of visits to local physicians. A retrospective cohort study was then conducted on a random cluster sample of residents. Of 709 residents interviewed, 202 (28.5%) were definite cases (at least three liquid stools/day or vomiting) and 62 (8.7%) were probable cases (less than three liquid stools/day or abdominal pain). Those who had drunk tap water had a three-fold increased risk for illness (95% CI 2.4-4.0). The risk increased with the amount of water consumed (chi-square trend: p &lt; 0.0001). Bacteriological analyses of stools were performed for 35 patients and virological analyses for 24 patients....
Tipo: Text
Palavras-chave: Waterborne outbreak; Rotavirus; Norovirus; Gastroenteritis; Epidemiology; Campylobacter coli.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1696.pdf