AVIAN INFLUENZA [BIRD FLU]
Abstract
Avian influenza is the most important pandemic disease in all over the world and causes more economic loss, significant morbidity and mortality in humans, birds, swine. From 1970s onwards avian influenza came into ecological focus when monitoring and surveillance indicated that ubiquitous presence of asymptomatic infection noticed in wild waterfowl with LPAI viruses and sporadically with HPAI viruses posing a common threat to commercial chicken industries and sudden outbreaks are mainly due to mutations derived from LPAI viruses found in wild bird populations. HPAI viruses lineage derived from Goose\Guangdong\1\1996, highly pathogenic avian influenza virus evolved by genetic reassortment, antigenic shift and drift, this lineage emerged firstly in China in 1996. The Eurasian H5N1 virus lineage has mutated with different neuraminidase subtypes giving rise to H5N2, H5N3, H5N5, H5N6 and H5N8 HPAI viruses. Many migratory birds are travel from one country to another country so its very difficult to stop the spreading of the disease.
Keywords: H5N1, Zoonotic, biosecurity, outbreak, vaccine
NAVIN KUMAR. G (4TH year)
N GURUNATHAN
ASSISTANT PROFESSOR
RAJIV GANDHI INSTITUE OF VETERINARY EDUCATION AND RESEARCH, PUDUCHERRY.
