Bison Parasite Management Habits Examined
A new Texas A&M study reveals frequent dewormer use among bison producers, highlighting risks for parasite resistance.
Updated on Sept. 21, 2026 in Pet Health
Live Poll
Should agricultural producers prioritize diagnostic testing over routine chemical treatment to prevent drug resistance?
Texas A&M researchers surveyed bison producers in the southern and central United States regarding their parasite control methods. The findings reveal that most producers rely on frequent deworming, yet rarely use diagnostics or refugia strategies to manage herd health.
Why it matters
Widespread drug use without diagnostic testing increases the likelihood that parasites will develop resistance to the few available treatments. This creates long-term health risks for herds, potentially leading to poor weight gain and production losses.
Nearly 90% of surveyed producers deworm their bison at least once a year, while one-third do so more than twice. Only one product is currently FDA-approved for treating gastrointestinal nematodes in the species.
The players
Texas A&M
A major public research university in Texas known for its extensive agricultural extension services and veterinary research programs.
The details
Producers frequently rely on medicated feed to deliver dewormers, a method used to overcome the difficulties associated with handling these large animals. However, the study found that diagnostic tools are seldom used to confirm if treatment is actually necessary for the herd. Without these checks or the use of refugia strategies to maintain susceptible parasite populations, the current approach may inadvertently accelerate drug resistance.
Timeline
September 21, 2026: Texas A&M published the bison parasite study results.
The Home Front
This development follows a broader trend of increased scrutiny regarding antibiotic and anthelmintic stewardship across the agricultural sector. As new classes of dewormers remain scarce, maintaining existing treatment efficacy has become a critical priority for niche livestock management.
If you manage a small herd or own livestock, prioritize using diagnostic testing before administering medications to ensure the treatment is necessary. Consult with a licensed veterinarian to develop a targeted deworming plan that avoids unnecessary drug exposure.
The takeaway
The study serves as a reminder that routine medication without diagnostic confirmation can lead to long-term herd health challenges. Producers should prioritize testing and discuss refugia strategies with a veterinarian to preserve the effectiveness of available anthelmintics.
Further reading
For more on managing animal health, visit the Pet Health section.
Source note: This article includes information reported by Texas A&M Stories.
Live Poll
Should agricultural producers prioritize diagnostic testing over routine chemical treatment to prevent drug resistance?
