Dan’s Cow-Calf Corner Are Worms Winning?

Rosslyn Biggs, DVM, OSU State Extension Beef Veterinarian & John Gilliam, DVM, OSU College of Veterinary Medicine — It is impossible to know if resistant gastrointestinal parasites are present on an operation unless testing is performed. Although limitations exist, the Fecal Egg Count Reduction Test (FECRT) to assess the efficacy of parasite control programs is the only practical method of determining the presence of resistance in cattle nematodes at the farm level.Recent research by Drs. John Gilliam, Jared Taylor, and Ruth Scimeca of the OSU College of Veterinary Medicine has provided evidence that apparent resistance exists in Oklahoma cow-calf herds.…

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