Nipah virus is a zoonotic virus that belongs to the Paramyxoviridae family, genus Henipavirus. It was first identified in 1999 during an outbreak of encephalitis and respiratory illness among pig farmers and others with close contact with pigs in Malaysia and Singapore. The virus is named after the Malaysian village, Sungai Nipah, where the first outbreak occurred. ### **Virology:** Nipah virus is an enveloped, single-stranded RNA virus with a negative-sense genome. It has a helical nucleocapsid and glycoproteins on its surface that facilitate attachment and entry into host cells. ### **Reservoir Hosts:** Fruit bats of the Pteropus genus, particularly Pteropus bats, are considered the natural reservoir hosts for Nipah virus. These bats are asymptomatic carriers of the virus, and transmission to humans typically occurs through direct or indirect contact with their saliva, urine, or feces. ### **Transmission to Humans:** Humans can be infected by Nipah virus through contact with infecte
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