Update on the Cause of Equine Atypical Myopathy

In the Journal of the British Veterinary Association is a new article titled “Update on the cause of equine atypical myopathy.” This article discusses a “breakthrough” in this disease.

This article is available for purchase online.


“Atypical myopathy was first recognised in grazing horses in 1939 in East Scotland and first reported in the literature in 1942 (Bowen 1942). The condition was named acute myopathy or atypical myoglobinuria due to clinical signs seen in the first identified cases. Early reports described recumbent and weak horses that often died within the first 12 to 72 hours. Suspected cases sporadically occurred in several countries such as the USA, Canada and Australia, although it was known as seasonal pasture disease in these locations. The first major outbreak, which raised awareness of the condition worldwide, occurred in Germany in 1995. Since 2000, numbers of outbreaks and affected animals increased considerably in central Europe, triggering the beginning of epidemiological investigations into the mechanisms of disease and methods for its prevention.”


Sonia Gonzalez-Medina, CertAVP(EM), MRCVS, Centre of Preventive Medicine, Animal Health Trust, Newmarket, UK.

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