Wisconsin strangles case highlights intake biosecurity risk

A mare in Wisconsin has tested positive for strangles, according to an EDCC Health Watch report carried by Equus. The horse, which came from a rescue and now lives in Jefferson County, is the latest reminder that equine infectious disease risk often follows movement, intake, and commingling. A separate EDCC Health Watch report in EquiManagement said a 2-year-old Quarter Horse gelding in Marquette County, Michigan, tested positive on March 5 after developing bilateral nasal discharge on February 23; one additional horse was suspected positive, and two had been exposed. Strangles is caused by Streptococcus equi subspecies equi and spreads readily through direct contact and contaminated equipment or surfaces. (equimanagement.com)

Why it matters: For equine veterinarians and practice teams, these cases underscore the routine but high-consequence biosecurity questions around new arrivals, rescue intake, and apparently mild respiratory illness. EDCC notes that horses can spread strangles even when they aren’t showing obvious signs, and recovered horses may remain contagious for weeks, which makes isolation, diagnostic testing, and careful communication with barns and pet parents especially important. Michigan also lists strangles among its reportable equine diseases, reinforcing the regulatory and surveillance role veterinarians play when cases are suspected or confirmed. (equinediseasecc.org)

What to watch: Watch for any follow-up EDCC alerts tied to quarantine status, additional exposed horses, or linked cases in Wisconsin and Michigan. (equimanagement.com)