Increase in Atypical Myopathy Cases Prompts Warning

Atypical myopathy is a highly fatal muscle disease caused by hypoglycin A, a toxin found in sycamore maple seeds.

No account yet? Register


The British Equine Veterinary Association (BEVA) has reported an increase in the number of diagnosed atypical myopathy cases.

"There has been a recent surge in cases of atypical myopathy, even in areas where the disease has not previously been reported," the organization said in a statement on its website.

Atypical myopathy is a highly fatal muscle disease in the United Kingdom and northern Europe. Researchers recently learned that horses develop the condition after ingesting hypoglycin A, a toxin found in sycamore maple (Acer pseudoplatanus) seeds.

"Recent high winds and heavy rain have resulted in large numbers of seeds falling from trees in a very short period of time, posing a risk to horses grazing on surrounding fields," the BEVA statement said

Create a free account with to view this content. is home to thousands of free articles about horse health care. In order to access some of our exclusive free content, you must be signed into

Start your free account today!

Already have an account?
and continue reading.


Written by:

Erica Larson, former news editor for The Horse, holds a degree in journalism with an external specialty in equine science from Michigan State University in East Lansing. A Massachusetts native, she grew up in the saddle and has dabbled in a variety of disciplines including foxhunting, saddle seat, and mounted games. Currently, Erica competes in eventing with her OTTB, Dorado.

Related Articles

Stay on top of the most recent Horse Health news with

FREE weekly newsletters from

Sponsored Content

Weekly Poll

sponsored by:

When do you begin to prepare/stock up on products/purchase products for these skin issues?
98 votes · 98 answers

Readers’ Most Popular

Sign In

Don’t have an account? Register for a FREE account here.

Need to update your account?

You need to be logged in to fill out this form

Create a free account with!