RESUMEN
We report the use of environmental samples to assess avian influenza virus activity in chickens at live poultry markets in China. Results of environmental and chicken samples correlate moderately well. However, collection of multiple environmental samples from holding, processing, and selling areas is recommended to detect viruses expected to have low prevalence.
Asunto(s)
Crianza de Animales Domésticos , Subtipo H7N9 del Virus de la Influenza A/aislamiento & purificación , Gripe Aviar/epidemiología , Animales , Pollos , China/epidemiología , Comercio , Gripe Aviar/virología , Aves de Corral , PrevalenciaRESUMEN
We compared the detection frequency of avian influenza H7 subtypes at live poultry markets in Guangdong Province, China, before and after the introduction of a bivalent H5/H7 vaccine in poultry. The vaccine was associated with a 92% reduction in H7 positivity rates among poultry and a 98% reduction in human H7N9 cases.
Asunto(s)
Subtipo H7N9 del Virus de la Influenza A/inmunología , Vacunas contra la Influenza/inmunología , Gripe Aviar/prevención & control , Gripe Humana/prevención & control , Vacunación/veterinaria , Animales , China , Humanos , Gripe Aviar/virología , Gripe Humana/virología , Aves de Corral/virología , ZoonosisRESUMEN
During 2016 in Guangzhou, China, we detected infectious avian influenza viruses (AIVs) in 39.8% of samples from chicken carcasses slaughtered at live poultry markets but none from carcasses supplied to supermarkets by facilities bypassing live poultry markets. Promoting supply chains with high biosecurity may reduce the risk for zoonotic AIV transmission.