New study reveals gaps in bison parasite management

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Published: 2026-09-21T21:40:37.453Z • Permanent link

A team of researchers from the University of Montana has released a groundbreaking study that sheds light on the complex issue of bison parasite management in North America. Led by Dr. Maria Rodriguez, a renowned expert in wildlife health, the study aimed to investigate the effectiveness of commonly used drugs against gastrointestinal parasites in bison. The findings have significant implications for the livestock industry, wildlife conservation, and human health.

The study, which was conducted in collaboration with the USDA's Animal and Plant Health Inspection Service (APHIS), analyzed data from over 1,000 bison from various ranches and wildlife management areas across the United States. The researchers discovered that the most frequently used drugs, such as ivermectin and fenbendazole, can become less effective when used too frequently or without proper monitoring. Moreover, the study revealed that these parasites can develop resistance to these drugs, making it challenging to control their populations.

The research was sparked by concerns raised by ranchers and wildlife managers about the increasing prevalence of gastrointestinal parasites in bison populations. In response, the APHIS launched a nationwide initiative to monitor and control parasite infestations in bison herds. Dr. Rodriguez's team worked closely with APHIS scientists to develop a new approach to parasite management, which involves using a combination of drugs and non-chemical methods, such as vaccination and behavioral modifications.

The findings of this study have far-reaching implications for the livestock industry, particularly for companies that rely on bison for their products. Companies like Cargill and JBS, which are major players in the bison meat market, may need to reassess their parasite control strategies to ensure the quality and safety of their products. The study's results also have significant implications for wildlife conservation efforts, as the control of parasites can impact the health and productivity of bison populations.

The research community, which has been closely monitoring the issue of bison parasites, will also need to adapt to the new findings. The study's results challenge the conventional wisdom that relying on a single drug can effectively control parasite infestations. Instead, the researchers recommend a more nuanced approach that takes into account the complex interactions between parasites, bison, and the environment. This shift in thinking has significant implications for the development of new treatments and management strategies.

The study's findings are part of a larger pattern of growing concerns about the impact of parasites on livestock and wildlife populations. In recent years, there has been a significant increase in the number of reports of parasite infestations in bison herds, as well as in other livestock species. This trend has led to increased scrutiny of parasite control strategies and the development of new approaches to management.