Antibiotic Resistance in Horses

A wide variety of antibiotic drugs have saved millions of lives by killing the deadly bacteria that make people and animals sick. But, increasingly, bacteria are becoming resistant to the most-used antibimicrobial drugs. A bacterium is deemed to be resistant if it can survive in the highest concentration of the antibiotic drug that can be achieved in the animal’s body. We’ve known that this is true for humans for some time, but it is also true for horses. What is Antibiotic Resistance? When a horse has a bacterial infection, and is given an antibiotic drug, most of the targeted bacteria in the animal’s system will be killed. However, out of the millions of bacteria present in the sick animal’s body, some will have natural mutations that make them resistant to the drug, so they survive. This resistance takes various forms. According to a 2012 article in the Equine Veterinary Journal…

Subscription Upgrade Required

Upgrade your subscription now for full access or register to continue reading.


Subscribers: enter the email and password connected to your subscription.

First time logging in?
Click here.

Tablet/Mobile users must also refresh after login to activate subscription.

Not a subscriber yet?
Click here to see our print and digital subscription offers that include full access to all articles.

Subscribe now and enjoy full access to

Your All-Access Digital Subscription includes unlimited access to all articles as well as a digital subscription to each issue of Horse Sport, Horse Canada, and Canadian Thoroughbred.

digital subscription

Get full access to including all articles from Horse Sport, Horse Canada, Canadian Thoroughbred, and The Canadian Horse Annual.

print subscription

Read the digital editions of Horse Sport, Horse Canada, Canadian Thoroughbred, and The Canadian Horse Annual.

View Print and Digital Subscription Offers

Love our Articles?

If you enjoyed reading the articles on this website, consider subscribing to get upcoming issues as they are published! Simply click on the button below to see your options.


to top