Effects of aerosolized rabies virus exposure on bats and mice.

Between 1956 and 1977, 4 human cases of rabies virus infection were attributed to aerosolized rabies virus; however, little work has been done to address this topic since the late 1960s. Employing modern nebulization equipment coupled with serologic, cell culture, and molecular technology, we have continued the investigation into aerosolized rabies virus as a potential route of transmission. Laboratory mice and 2 species of bats were exposed, through aerosol, to 3 variants of rabies virus. All bats survived exposure to aerosolized rabies virus and produced rabies neutralizing antibody. Several mice died of rabies as a result of aerosol exposure. Antibody response was followed for 6 months before animals were given an intramuscular challenge of rabies virus. Poor protection from challenge was afforded in bats, despite the presence of neutralizing antibodies.

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