Oklahoma cow-calf herds - Dewormer resistance study

USAgNet - 03/28/2024

Dewormer resistance poses a significant challenge for cattle producers, impacting both animal health and financial resources. Recent research from Oklahoma State University (OSU) highlights the urgent need to address this issue in cow-calf operations across the state.

OSU researchers have identified evidence of anthelmintic resistance in a majority of participating cow-calf herds in Oklahoma. Through fecal egg count reduction testing (FECRT), 81% of the herds showed signs of resistance, signalling a pressing concern for cattle health management.

To expand this research, OSU is inviting Oklahoma cattlemen and veterinarians to participate in a larger study in 2024. The study aims to collect data from at least 50 different groups of cattle statewide, focusing on animals in similar stages of production.

Producers interested in participating must have adequate animal handling facilities for safe fecal collection. Samples will be collected before and after deworming, with sampling supplies provided at no cost. OSU researchers will coordinate with participants, and extension personnel will offer support throughout the process.

The study prioritizes animals between the ages of weaning and yearling, encompassing various classes such as mature cows, weaned calves, and stocker heifers. Preference will be given to operations with young animals to better understand dewormer effectiveness in this critical age group.

Participants will receive laboratory testing and veterinary interpretation of results at no cost. By contributing to this research, producers can gain valuable insights into dewormer efficacy and help develop strategies to combat parasite resistance in Oklahoma's cow-calf herds.

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