The Thai Journal of Veterinary Medicine


The anthelmintic activity of single oral doses of thio- phanate at the rates of 50 and 70 mg/kg of body weight were determined by the field trial method against innature Neoascaris vitulorum in buffalo calves. Thiophanate at the rates of 50 and 70 mg/kg were highly effective (100 percent) against immature N. vitulorum. No buffalo calves developed patent infections after treatment by determining the worm eggs in the feces. Average weight gain in the thiophanate-treated groups were significantly greater than that of the untreated group. Average daily weight gain was 0.48 and 0.51 kg in the the thiophanate-treated calves at 50 and 70 mg/kg respectively, while the untreated calves have 0.32 kg average daily weight gain.

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