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| 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 < 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 |
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| 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 |
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