Science: Death on Leathery Wings

For people who live in temperate countries, vampire bats are colorful items for horror stories. In Latin America they are a too real horror. They carry rabies and transmit it to humans and animals, whose blood they drink. Rabies does not necessarily kill the vampires, and anti-bat measures by humans do not kill enough of them. Last week a Brazilian naturalist, Dr. Augusto Ruschi, 41, was working out a new solution of the vampire problem: biological warfare with a disease that kills bats only.

The vampire menace of Latin America has been building up...

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