Anatomy of bluetongue virus serotype 8 epizootic wave, France, 2007-2008

Durand Benoit, Zanella Gina, Biteau-Coroller Fabienne, Locatelli Caroline, Baurier Florence, Simon Cécile, Le Dréan Eric, Delaval José, Prengère Eric, Beauté Véronique, Guis Hélène. 2010. Anatomy of bluetongue virus serotype 8 epizootic wave, France, 2007-2008. Emerging Infectious Diseases, 16 (12) : 1861-1868.

https://doi.org/10.3201/eid1612.100412

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Quartile : Outlier, Sujet : INFECTIOUS DISEASES / Quartile : Q1, Sujet : IMMUNOLOGY

Résumé : The introduction of bluetongue virus serotype 8 into northern Europe at the end of summer 2006 initiated one of the most widespread epizootics of bluetongue infection ever to occur. In winter 2007-2008, a cross-sectional serologic study was conducted in France along a transect perpendicular to the epizootic wave. Cattle herd-level seroprevalence varied from 4% to 100%, and animal-level seroprevalence from <1% to 40%. Only a low proportion of seropositive herds reported clinical cases in 2007. Sheep flocks were less frequently affected than cattle herds. The local occurrence of clinical cases and environmental indicators linked to forests were seropositivity risk factors, whereas the local density of cows had a protective effect. Overall results suggest that amplification of virus circulation in affected herds played a limited role in the epizootic wave diffusion and that bluetongue virus serotype 8 circulation in natural ecosystems could have played a substantial role in this progression.

Mots-clés Agrovoc : virus bluetongue, virologie, sérotype, épidémiologie, bovin, ovin, sérologie

Mots-clés géographiques Agrovoc : France

Classification Agris : L73 - Maladies des animaux

Champ stratégique Cirad : Axe 4 (2005-2013) - Santé animale et maladies émergentes

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