
California Warmblood Stallion Tests Positive for WNV
A Dutch Warmblood stallion in Yolo County has tested positive for West Nile virus. This is California’s fourth confirmed equine WNV case in 2025.
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A Dutch Warmblood stallion in Yolo County has tested positive for West Nile virus. This is California’s fourth confirmed equine WNV case in 2025.

The horse lives in Orange County.

The horse lives in the Regional Municipality of Waterloo.

An undervaccinated mare in the Regional Municipality of Peel, Ontario, has tested positive for West Nile virus.

One horse contracted the disease after new boarders moved to the farm.

The horse lives in Cecil County, where one other horse is suspected to be positive.

Two horses in Utah, located in Box Elder and Rich counties, have tested positive for West Nile virus.

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The cases are located in Grayson, Fayette, and Lyon counties.

The mare lives in Stanislaus County and is recovering.

The horse lived in LaGrange County.

The horses live in Marion and Alachua counties.

The case is located in Montgomery County.

The horse lives in Twin Falls County.
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