Murray Valley Encephalitis

Viral Diseases

Animals Involved

Wild water birds

Known Distributions

Australia, New Guinea

Probable Means of Spreading

Mosquito bites (Culex annulirostris)

Clinical Manifestations in People

Asymptomatic or mild nonspecific febrile illness in majority; encephalitis, often with neurologic sequelae, or poliomyelitis­like flaccid paralysis in small number of patients; case fatality rate 15%–30% in encephalitic form

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