RESUMO
Rift Valley fever threatens human and animal health. After a human case was confirmed in Comoros in 2007, 4 serosurveys among ruminants in Mayotte suggested that Rift Valley fever virus had been circulating at low levels since 2004, although no clinical cases occurred in animals. Entomologic and ecologic studies will help determine outbreak potential.
Assuntos
Doenças dos Bovinos/epidemiologia , Doenças das Cabras/epidemiologia , Febre do Vale de Rift/veterinária , Vírus da Febre do Vale do Rift/imunologia , Animais , Anticorpos Antivirais/sangue , Bovinos , Doenças dos Bovinos/imunologia , Doenças dos Bovinos/virologia , Comores/epidemiologia , Doenças das Cabras/imunologia , Doenças das Cabras/virologia , Cabras , Estudos Longitudinais , Prevalência , Estudos Retrospectivos , Febre do Vale de Rift/epidemiologia , Febre do Vale de Rift/imunologia , Febre do Vale de Rift/virologia , Estudos SoroepidemiológicosRESUMO
This paper describes the sensitivity and specificity of a commercial competitive ELISA for the detection of antibodies to Rift Valley fever virus (RVFV) from sera of French domestic ruminants. Field samples were collected from mainland France for the known-negative sera (cattle=191, goats=119, sheep=192) and from ruminants of a French overseas territory (Mayotte) for the known-positive sera. A cut-off value of 43% was determined for all species, achieving a sensitivity and specificity of 100% and a concordance of 100% with the species-specific threshold recommended by the manufacturer. Our results demonstrate that this ELISA may be a suitable diagnostic tool for disease surveillance programmes and import/export veterinary certification of French cattle, goats and sheep.