New York City's crows were dying.
It was the summer of 1999, and Tracey McNamara, then the chief veterinary pathologist at the Bronx Zoo, was growing concerned. The crows were dying in scores — staggering, having seizures, keeling over. Soon, the mysterious illness came for the zoo's exotic birds. Three flamingos, a cormorant, an Asian pheasant — all dead within a few days of one another.
"Anything that dropped dead on our grounds got necropsied, and I pursued a diagnosis," says McNamara, now a professor at Western University. McNamara had a mystery: What was killing the birds? "I already knew that we were not dealing with anything known to veterinary medicine," she says"It was something new. And then when I heard that people were dying of an unusual encephalitis, I'm like, 'Oh, there's a link.'" That September, several residents of New York City had contracted and died of a similar illness. Read more...
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