Texas A&M Researchers Studied Bison Parasite Control

A new study reveals that most bison producers rely on frequent deworming without using diagnostic testing.

Updated on Sept. 21, 2026 in Pet Health

Screen-print poster illustration showing a bison silhouette on a prairie, evoking agricultural research and herd management. — Texas A&M researchers report that many bison producers frequently use deworming treatments without diagnostic testing, raising concerns about potential parasite resistance. AI Illustration. Upload story photo >

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Should agricultural producers prioritize diagnostic testing over routine chemical treatment to prevent drug resistance?

Researchers at Texas A&M have published a study examining parasite management practices among bison producers in the southern and central United States. The findings highlight widespread drug use that could increase the risk of parasite resistance.

Why it matters

Frequent use of anthelmintics without diagnostic testing increases the risk that parasites will develop resistance to the few drugs available for bison. Developing targeted management strategies is essential for maintaining herd health and production efficiency.

Nearly 90% of producers deworm their herds annually, with nearly one-third treating them more than twice per year. Currently, only one product is FDA-approved for treating gastrointestinal nematodes in bison.

The players

Texas A&M

This public research university conducted the study to evaluate parasite management strategies within the bison industry.

The details

Researchers surveyed producers across the southern and central United States regarding their herd demographics and parasite control methods. Due to the challenges of handling large animals, producers often rely on medicated feed to administer treatments instead of using diagnostic tools to verify if the deworming is necessary.

September 21, 2026: The bison parasite study results were published by Texas A&M researchers.

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Culture Shift

This research highlights the intersection of livestock management and the growing global concern regarding antimicrobial and antiparasitic resistance. By identifying current reliance on solitary treatment options, the study underscores a broader shift toward seeking sustainable, science-based agricultural practices.

For those managing herds, the research suggests that shifting toward diagnostic-based treatment may improve long-term herd health outcomes and save on medication costs. Producers are encouraged to evaluate current deworming routines to mitigate the future risk of parasite resistance.

The takeaway

Producers should consider implementing diagnostic testing before administering dewormers to ensure treatments remain effective for future use. Reducing dependency on frequent, blanket drug applications helps protect the long-term viability of the only currently approved medication.