Ontario Quarter Horse tests positive for strangles

An Ontario Quarter Horse has tested positive for strangles at a training facility in Wellington, according to an Equine Disease Communication Center alert carried by The Horse. The case was reported as a single confirmed infection under voluntary quarantine, with no exposed horses listed in the alert summary. The report adds to a broader pattern of strangles activity in Ontario, where multiple cases were already documented in early 2025, including other Wellington County horses linked to respiratory exposure and horse movement between facilities. (equinedisease.com)

Why it matters: For equine veterinarians and practice teams, this is another reminder that strangles remains a recurring biosecurity challenge in Ontario, especially in facilities with frequent horse movement such as training and boarding operations. Ontario designated strangles an immediately notifiable disease in 2023, and provincial guidance emphasizes rapid isolation, movement restrictions, hygiene measures, and follow-up testing because some horses can become longer-term carriers after apparent recovery. The Horse’s background notes that transmission can occur through direct contact and contaminated surfaces, and that recovered horses may remain contagious for weeks. (ontario.ca)

What to watch: Watch for any additional exposed or confirmed horses tied to the Wellington facility, and for whether voluntary quarantine is enough to contain spread without broader movement restrictions. (equinedisease.com)