This suggests a short incubation period with direct transmission from the pigs to the humans. The main clinical presentations were fever, headache, dizziness, and vomiting. Other distinctive clincal symptoms include areflexia and hypotonia, segmental myoclonus, hypertension, and tachycardia. An abnormal doll's-eye reflex and tachycardia were indicators of poor prognosis. Thus, Nipah virus causes a severe, rapidly progressive encephalitis with a high mortality rate.
Clinical features suggest brain stem involvement.
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