Researchers Examine the ‘Ecosystem’ in the Horse’s Gut

Scientists hope biomarkers in gut microbiota could be used as diagnostic or prognostic indicators in the future.
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What can the microbes living inside your horse’s gut say about the current state of his health? A recent study by researchers at the University of Missouri suggests there’s quite a lot to learn. But sampling these bacteria is no easy feat.

Traditionally, the only microbes researchers could study were those residing in the large intestine or found in fecal matter. But they believed that analyzing harder-to-reach microbes—those living in the stomach, small intestine, and cecum—might yield more information.

“The luminal bacteria are the focus of most microbiome studies wherein fecal samples are collected,” said Aaron Ericsson, DVM, PhD, a research assistant professor in the University of Missouri’s Department of Veterinary Pathobiology. “We wanted to determine if the populations of bacteria in intimate contact with the epithelium (tissues lining the gastrointestinal tract) were distinct from the luminal populations.”

To that end, a team of researchers set out to generate a detailed DNA profile of healthy gastrointestinal tract (GIT) bacteria from nine adult horses euthanized for reasons unrelated to metabolic or intestinal disease. The team sampled microbes found in both food particles and feces (luminal), as well as microbes attached to the mucous lining the GIT’s walls (mucosal), taking care to collect samples from similar locations between horses

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Casie Bazay is a freelance and young adult writer, as well as a certified equine acupressure practitioner. She also hosts a blog, The Naturally Healthy Horse. Once an avid barrel racer, she now enjoys giving back to the horses who have given her so much.

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