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West Nile Virus
| Introduction |
| West Nile virus (WNV) is a vector-borne virus that was recognized in the Western
Hemisphere for the first time in 1999. Mosquitoes circulate the virus among wild birds.
Occasionally, the virus is introduced into other vertebrate populations, such as humans
or horses, that serve as incidental hosts. Incidental hosts are infected animals that do
not pass the virus on to vectors (mosquitos, in this case). This disease has had a
devastating effect on the equine community. |
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