WNV in Arizona
WNV is transmitted to horses via bites from infected mosquitoes. | Photo: iStock

The Equine Disease Communication Center (EDCC) reported Aug. 27 that two horses in Maricopa County, Arizona, have tested positive for West Nile virus (WNV). These are the first confirmed cases of WNV in Arizona horses in 2018.

The Arizona Department of Agriculture (ADA) confirmed the first case on Aug. 23.

“On Aug. 17, the 18-month-old filly had acute onset of neurologic signs,” the EDCC said. “The horse had moved with other horses from Wyoming on Aug. 14. No other horses on the property are showing symptoms and this horse is responding to treatment

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