Merck Manual

Please confirm that you are a health care professional

honeypot link

Toxic Myopathies in Horses

By

Stephanie J. Valberg

, DVM, PhD, DACVIM, ACVSMR, McPhail Equine Performance Center, Michigan State University

Last full review/revision Feb 2014 | Content last modified Feb 2014

Ionophores

Ionophores are commonly added to ruminant feeds for their growth promotion and coccidiostat properties. Horses, however, are 10 times more sensitive to the toxic effects of ionophores in feed than cattle. When equine feeds are inadvertently contaminated with ionophores or horses eat cattle feed, some animals may die acutely with colic-like signs, myoglobinuria, hypokalemia, cardiac arrhythmia, and tachypnea. Cardiomyopathy is the most common chronic sequela.

Others also read
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
Test your knowledge
Musculoskeletal Disorders in Large Animals
A seven-year-old Quarter horse gelding presents with a 1-week history of mild lameness. During the examination, the horse raises his head as he places weight on his left forelimb and drops it when placing weight on the right forelimb. Which limb is most likely affected in this horse?
Become a Pro at using our website 

Also of Interest

Become a Pro at using our website 
TOP