Eastern equine encephalitis virus: Difference between revisions
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==Background== |
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===Microbiology=== |
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*Virus in the [[Family::Togaviridae]] family and [[Genus::Alphavirus]] genus |
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===Epidemiology=== |
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*Mosquito-borne avian infection carried by the [[Vector::Culiseta melanura]] mosquito |
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*Horses and humans are dead-end hosts, infected by bridge vectors including [[Vector::Aedes vexans]] and [[Vector::Coquillettidia perturbans]] |
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*Usually only a handful of human cases annually in North America, and only one human case ever recorded in Ontario |
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==Clinical Manifestations== |
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*Most are asymptomatic |
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*Incubation period of [[Usual incubation period::4 to 10 days]] |
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*For those who develop disease, it usually begins with an influenza-like illness, with fever, malaise, arthralgia, and myalgia, which lasts one to two weeks |
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*Some people develop neurologic disease during the febrile illness, which may progress to encephalitis |
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*There is a high mortality rate among those who develop [[encephalitis]], with death usually occuring between 2 and 10 days after illness onset |
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*It is possible to have permanent and severe neurologic sequelae |
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Latest revision as of 12:05, 29 October 2020
Background
Microbiology
- Virus in the Togaviridae family and Alphavirus genus
Epidemiology
- Mosquito-borne avian infection carried by the Culiseta melanura mosquito
- Horses and humans are dead-end hosts, infected by bridge vectors including Aedes vexans and Coquillettidia perturbans
- Usually only a handful of human cases annually in North America, and only one human case ever recorded in Ontario
Clinical Manifestations
- Most are asymptomatic
- Incubation period of 4 to 10 days
- For those who develop disease, it usually begins with an influenza-like illness, with fever, malaise, arthralgia, and myalgia, which lasts one to two weeks
- Some people develop neurologic disease during the febrile illness, which may progress to encephalitis
- There is a high mortality rate among those who develop encephalitis, with death usually occuring between 2 and 10 days after illness onset
- It is possible to have permanent and severe neurologic sequelae
