Autumn treatment with morantel-diethylcarbamazine in yarded cattle
Cornwell, R.L.; Jones, R.M.; Pott, J.M.
Veterinary Record 92(25): 668-671
1973
ISSN/ISBN: 0042-4900 PMID: 4731143 Document Number: 62908
Field trials involving 88 cattle were carried out on four farms with a history of type II ostertagiasis (winter ostertagiasis) in Scotland in 1969/70. A combination of morantel tartrate and diethylcarbamazine at a single dose of 10 mg per kg of each component given at the time of removal from pasture for winter yarding in November/December, resulted in significant growth responses over controls. An increased liveweight gain of 11.8 kg (25.9 lb) or 45.5% over controls was recorded for the 22 weeks of the experiment. Faecal egg counts consisting of Cooperia, Ostertagia and Trichostrongylus were reduced to zero in samples taken four and six weeks after treatment. A slowly rising egg output returned in the 10th week. The controls showed a reduction in egg output in the sixth week followed by a gradual increase to initial levels at the end of the experiment. There were no clinical signs during the trials.