| efficacy of febantel against naturally acquired gastrointestinal nematodes in calves, and recognition of oesophagostomum venulosum in oregon cattle. | the efficacy of febantel (5.0 mg/kg) against naturally acquired infections of gastrointestinal nematodes was evaluated in a controlled test in calves during the winter. twenty steers were allotted to either control or treatment groups of 10 animals each. seven days after treatment, calves were euthanatized and necropsied for recovery of parasites. febantel was highly effective against adults of ostertagia spp (88.6% efficacy based on median), cooperia spp (97.7%), trichostrongylus spp (98.2%), o ... | 1988 | 3223663 |