Wisconsin strangles case puts intake biosecurity back in focus

VERSION 1 — BRIEF

A mare in Jefferson County, Wisconsin, has tested positive for strangles after arriving from a rescue, according to an EDCC Health Watch report carried by Equus Magazine. A separate EDCC report, published by EquiManagement/Equus, 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 is suspected positive, and two were exposed. In Wisconsin, the Jefferson County case adds to a recent run of strangles activity in the state, including a 21-year-old Trakehner mare at a boarding facility in the same county that tested positive on January 20, with 40 horses exposed. (equusmagazine.com)

Why it matters: For equine veterinarians and practice teams, the Wisconsin case is a reminder that horses entering from rescue settings or other unknown-background environments can bring meaningful biosecurity risk. AAEP guidance says strangles spreads by direct contact and contaminated equipment, tack, buckets, and handlers, and recommends quarantining new arrivals for three weeks with temperature monitoring. The guidance also notes that apparently recovered horses can continue shedding, with guttural pouch testing and endoscopy useful for detecting carriers before horses join the resident population. Wisconsin requires suspected reportable animal diseases to be reported to state or federal animal health officials, and Michigan lists strangles among its reportable equine diseases. (aaep.org)

What to watch: Watch for whether additional exposed horses in Wisconsin or Michigan develop clinical signs, and whether quarantine, testing, or carrier screening identifies broader barn-level spread. (equusmagazine.com)