Wisconsin Confirms Strangles and Potomac Horse Fever Cases

The Wisconsin Department of Agriculture reported that two horses have tested positive for strangles. The cases involve a 20‑year‑old Paint mare in Dunn County, identified on July 25 after a submandibular abscess developed, and a 2‑year‑old Friesian mare at a boarding facility in Portage County, confirmed on June 22. Both horses are recovering, and biosecurity measures are being emphasized to prevent further spread.

Separately, two horses at a boarding facility in Green County tested positive for Potomac horse fever on July 24. The affected animals, a 14‑year‑old Quarter horse gelding and a 20‑year‑old Thoroughbred gelding, showed fever and diarrhea starting July 22 and are now recovering. The disease, caused by *Neorickettsia risticii*, is transmitted through insects or contaminated water and can be severe, with a mortality rate up to 30%. Veterinarians advise vigilance and biosecurity during the seasonal outbreak period.

Both reports were issued through the Equine Disease Communication Center (EDCC), a nonprofit that disseminates verified equine disease information.