Nipah virus, family Paramyxoviridae, caused disease in pigs and humans in p
eninsular Malaysia in 1998-99. Because Nipah virus appears closely related
to Hendra virus, wildlife surveillance focused primarily on pteropid bats (
suborder Megachiroptera), a natural host of Hendra virus in Australia. We c
ollected 324 bats from 14 species on peninsular Malaysia. Neutralizing anti
bodies to Nipah virus were demonstrated in five species, suggesting widespr
ead infection in bat populations in peninsular Malaysia.