Second strangles case confirmed at Marquette County horse premises

Version 1 — Brief

A weanling colt in Marquette County, Michigan, tested positive for strangles on April 20 after developing yellow discharge from the nose and eyes on March 20, according to an EquiManagement item based on Equine Disease Communication Center reporting. The colt is recovering. The case marks the second confirmed strangles infection at the premises; the first was confirmed on March 5 in an unvaccinated 2-year-old Quarter Horse gelding, and one additional horse is listed as suspected. The outbreak is under voluntary quarantine, with the Michigan Department of Agriculture and Rural Development identified as the source agency. (equimanagement.com)

Why it matters: For equine veterinarians and practice teams, this is a reminder that strangles remains both common and operationally disruptive, especially when multiple horses on one premises are affected. MDARD lists strangles as a reportable equine disease in Michigan, and EDCC notes recovered horses can continue shedding for weeks, which makes case follow-up, movement restrictions, and biosecurity planning just as important as initial diagnosis. AAEP guidance also emphasizes isolation of new arrivals and strict outbreak biosecurity to limit spread through direct contact and contaminated equipment. (michigan.gov)

What to watch: Watch for whether the suspected horse is confirmed, how long quarantine remains in place, and whether local veterinarians or event managers in Michigan’s Upper Peninsula tighten movement and screening protocols. (equinediseasecc.org)