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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…

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