Wisconsin strangles case puts focus on intake biosecurity

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A mare in Jefferson County, Wisconsin, has tested positive for strangles after arriving from a rescue, according to an EDCC Health Watch report published by Equus Magazine. The case adds to a recent run of Upper Midwest strangles reports, including a 2-year-old Quarter Horse gelding in Marquette County, Michigan, that tested positive on March 5 after developing bilateral nasal discharge on February 23; one additional horse there was suspected positive, and two were exposed. Strangles is caused by Streptococcus equi subspecies equi and spreads through direct horse-to-horse contact or contaminated equipment and surfaces. (equusmagazine.com)

Why it matters: For equine veterinarians, the Wisconsin case is a reminder that horses entering from rescues, sales, and other mixed-origin settings can carry meaningful infectious-disease risk, even when history is incomplete. AAEP guidance recommends isolating new arrivals for three weeks, monitoring temperatures, and considering guttural pouch evaluation and PCR testing before introducing horses into the resident population. That matters because clinically normal horses can still shed S. equi, and persistent carriers can prolong or restart outbreaks. (aaep.org)

What to watch: Watch for any additional EDCC alerts tied to Jefferson County or linked facilities, plus whether state animal health officials or attending veterinarians recommend broader quarantine, testing, or tracing measures. (datcp.wi.gov)