Published in Medical Letter on the CDC and FDA, December 28th, 2003
According to recent research from that country, "Avian mortality and encephalomyelitis in equines are considered good indicators for West Nile virus (WNV) activity."
H. Weissenbock and coauthors at the University of Veterinary Medicine in Vienna "retrospectively tested 385 horse sera for WNV antibodies and looked for WNV nucleic acid and/or WNV antigen in paraffin embedded tissues from 12 horses with etiologically unresolved encephalomyelitis," and in "102 free-living birds of different species which had been found dead."
"With the exception of four horses originating from...
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