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Anthelmintic treatment of subclinical parasitism of feedlot cattle in Georgia.

Authors
  • Stewart, T B
  • Ciordia, H
  • Utley, P R
Type
Published Article
Journal
American Journal of Veterinary Research
Publisher
American Veterinary Medical Association
Publication Date
Jun 01, 1975
Volume
36
Issue
6
Pages
785–787
Identifiers
PMID: 1147332
Source
Medline
License
Unknown

Abstract

Forty heifer calves, 27 yearling heifers, and 64 yearling steers with naturally occurring infections of nematode parasites were treated with levamisole HCl or morantel tartrate or were not treated. Although heifer calves had much larger worm egg counts before treatment than yearling heifers, necropsies showed a smaller average number of nematodes in the calves. Both anthelmintics significantly reduced the egg counts. At the end of the experiments, 98 to 240 days after treatments, there was no significant difference among groups of cattle in respect to necropsy worm counts. An advantage of 5% in rate of gain in body weight was shown in each experiment or phase of an experiment in favor of the treated groups of cattle. Overall, an advantage of 6% in feed efficiency was calculated for the treated groups of cattle.

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