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The effect of anthelmintic treatment on the growth rate of beef calves following weaning



The effect of anthelmintic treatment on the growth rate of beef calves following weaning



New Zealand Journal of Experimental Agriculture 9(2): 129-134



The liveweight gains obtained from drenching 7- to 9-mo-old weaner beef steer or heifer calves were examined over a period of 9 yr in 15 trials covering 10 localities in New Zealand. Treated groups received either thiabendazole [TBZ] or cambendazole [CBZ] between weaning (autumn) and the following spring on 3-6 occasions at intervals of 4-8 wk. Similar untreated cattle were used as controls in all trials. The advantage in liveweight gain of groups treated with TBZ or CBZ ranged from 6.7-31.0 kg over controls. The trial periods ranged from 105-168 days. Fecal egg counts were low and clinical signs of parasitism were not apparent. Statistically significant improvement in liveweight of treated compared with control animals over the winter period was demonstrated in all trials, and in 9 of 10 trials these could be justified economically based on live valuations, or returns at slaughter.

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Accession: 001004364

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DOI: 10.1080/03015521.1981.10427816


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