Exploring the Equine Microbiome

Researchers are discovering how the vast and varied microbes in the horse’s gastrointestinal tract impact equine health.
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Exploring the Equine Microbiome
The intestinal microbiome is comprised of quadrillions of microbes, and keeping them all happy is imperative to horse health. | Photo: iStock

Researchers are discovering how the vast and varied microbes in the horse’s gastrointestinal tract impact equine health.

Much like the intrepid explorers using the Curiosity rover to examine the surface of Mars, searching for evidence of microbes, veterinary researchers are investigating the depths of the equine gastrointestinal tract to learn about microscopic life forms residing there and what they are doing. Scientists are, quite literally, going where no one has gone before.

But unlike the surface of Mars, where scientists have only caught glimpses of proof of past microbial life, the horse’s large intestine hosts an extremely diverse range of microorganisms. Identifying all the species and their exact roles, however, has been slow going. Those microorganisms, together with their genomes and their interactions in a particular environment, are referred to as the microbiome.   

“Studying the equine intestinal microbiome is important because horses are hindgut fermenters,” says Scott Weese, DVM, MSc, Dipl. ACVIM, a professor in the Department of Pathobiology at the University of Guelph’s Ontario Veterinary College. “Changes in the microbiome can result in diseases such as colic, colitis, and laminitis, which are leading causes of morbidity and mortality in horses

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Written by:

Stacey Oke, MSc, DVM, is a practicing veterinarian and freelance medical writer and editor. She is interested in both large and small animals, as well as complementary and alternative medicine. Since 2005, she’s worked as a research consultant for nutritional supplement companies, assisted physicians and veterinarians in publishing research articles and textbooks, and written for a number of educational magazines and websites.

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