Ergot Alkaloids’ Effects on Colts and Stallions

Preliminary research showed that ergot alkaloids had minimal effects on stallions’ and colts’ fertility.
Share
Favorite
Please login

No account yet? Register

ADVERTISEMENT

Horse breeders in parts of the country frequented by endophyte-infected tall fescue are likely aware of the problems the forage–more specifically the fungus inside the forage–can cause in broodmares. But this toxin’s effects on the other half of the breeding puzzle–stallions–remain widely unknown.

Richard Fayrer-Hosken, BVSc, PhD, Dipl. ACT, ECAR, MRCVS, professor of theriogenology at the University of Georgia College of Veterinary Medicine and author of a preliminary study on the topic, spoke Oct. 11 at the Gluck Equine Research Center Veterinary Science Seminar, in Lexington, Ky., where he explained that the effects of ergot alkaloids in colts and stallions do not appear as negative as those in broodmares.

Tall fescue covers an estimated 35 million acres in the United States, including pastures, high-traffic foot paths, golf courses, and backyards. A majority is endophyte-infected (EI). An endophyte is a fungus that lives symbiotically within the host plant and is not visible to the eye. The endophyte produces toxic alkaloids that, when eaten, cause different disorders including tall fescue toxicosis.

In broodmares, Fayrer-Hosken explained, EI tall fescue can cause numerous problems including increased early embryonic mortality, agalactia (poor milk let-down), placental edema (fluid swelling), retained placenta, increased abortion rate, increased gestational length, and increased rate of newborn mortality

Create a free account with TheHorse.com to view this content.

TheHorse.com 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 TheHorse.com.

Start your free account today!

Already have an account?
and continue reading.

Share

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 TheHorse.com

Sponsored Content

Weekly Poll

sponsored by:

What signs does your horse show when he has gastric ulcers? Please check all that apply.
70 votes · 181 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 TheHorse.com!