Volume: 48 Issue: 2
Year: 2017, Page: 1-5,
Received: July 18, 2017 Accepted: July 28, 2017 Published: Dec. 31, 2017
Annual influenza epidemics cause substantial morbidity, mortality and socioeconomic tolls. According to WHO estimates, about three to five million infections and 250,000 – 500,000 deaths occur annually. Influenza pandemic, aglobal outbreak caused by a new strain of influenza virus, also occurs occasionally in populations with less pre-existing immunity. Zoonotic influenza A virus infections occurs when avian and swine influenza virus cross the species barrier and cause severe disease in humans and other mammals. Avian influenza viruses account for most, but not all cases of zoonotic influenza infection in humans. Most of the human infections of zoonotic influenza virus are acquired mainly through direct contact with infected animals/birds or contaminated environment. In this review, the biology of influenza virus infection with special reference to the avian zoonoses and its public health significance is discussed. Despite better awareness and preparedness towards seasonal, pandemic or zoonotic outbreaks, influenza virus still remains to be a major public health threat that warrants constant surveillance
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