Pteropid bats (flying foxes), species of which are the probable natural hos
t of both Hendra and Nipah viruses, occur in overlapping populations from I
ndia to Australia. Ecological changes associated with land use and with ani
mal husbandry practices appear most likely to be associated with the emerge
nce of these two agents. (C) 2001 Editions scientifiques et medicales Elsev
ier SAS.