West Nile Disease: A New Threat for Birds, Horses, Humans
Jennifer Browning-Stone
Information Specialist
University of Illinois
College of
Veterinary Medicine
In 1999, veterinarians at the Bronx Zoo Wildlife Conservation Park in New York were perplexed by the sudden death of 24 birds from some kind of encephalitis (inflammation of the brain). A few cases of human encephalitis occurred in New York around the same time and were attributed at first to the St. Louis encephalitis virus, which is native to the United States, but does not usually cause disease in birds.
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