West Nile Virus

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Last updated 2:21 AM on 8/11/26
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13 Terms

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West nile virus

enveloped flavivirus, transmitted by mosquitoes, maintained in bird-host cycle

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WNV symptoms

80% have no/few symptoms, 20% develop fever + other symptoms

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mild symptoms

fever, headache, joint pain, vomitting, diarrhea, rash

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WNV severe disease

1 in 150 people can progress to severe symptoms

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WNV neuroinvasive diseae

infection of the CNS causes meningitis, encephalitis, or acute flaccid paralysis

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WNV death

CNS infection can result in death

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Treatment

no vaccine or specific antiviral treatment

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Reservoir

Birds

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WNV zoonosis

WNV is a zoonosis, it causes disease in birds & humans

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Accidental hosts

Humans and horses

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Dead-end host

humans are a dead end host, they don’t have a high enough blood viral load to infect mosquitoes

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WNV north america

local outbreaks began in the US in 1999 after introduction from birds

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vertical transmission

mother-to-child transmission