Flutrop CIRAD Avian Influenza

Authors and affiliations

T. Phan Dang(1), S. Desvaux(2), T.Vu Dinh(1), J.F. Renard(3), F. Roger(3), M. Peyre(3)

(1) Centre for interdisciplinary research on rural development (CIRRD), Hanoï agricultural university, Hanoï, Vietnam
(2) French Agricultural Research Center for International development(CIRAD), PRISE Consortium in Vietnam, National Institute of Veterinary Research, Hanoï, Vietnam
(3) CIRAD, F-34398 Montpellier, France

Abstract

Highly Pathogenic Avian Influenza caused by H5N1 virus has become endemic in some developing countries and millions of birds have been culled with large economical and sociological impacts. Since the end of the first vaccination campaign in Vietnam limited outbreaks in non-vaccinated domestic poultry have been reported. However, the virus is still circulating as confirmed by routine surveillance programs. Vaccination is a useful tool to be used to eradicate the disease, but the cost-benefit impact of different strategy needs first to be addressed at local level, where implementation is decided. Cost and outcome of a vaccination campaign depend on the vaccination coverage rate, the size of the flock and the risk faced. The choice of a vaccination strategy depends on the epidemiologic context and is function of the available vaccine type (inactivated or vectored), the targeted species (chicken, ducks, geese…) and the targeted poultry production sector (breeders, layers, broilers). The aim of this study was to measure the cost-benefit impact of Vietnam mass vaccination program at local level. Descriptive and participative epidemiology was used to collect data at farm, district and provinces levels in order to parameter and validate this model. An extrapolation of this model at a national level could be used by decision makers to evaluate and compare different vaccination strategies based on their cost-benefit ratio.

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