J. Anim Sci.
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J. Anim Sci. 1977. 45:1453-1457.
© 1977 American Society of Animal Science
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Rehabilitation in Lambs after Infection with Trichostrongylus Colubriformis1

G. M. J. Horton2

Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Republic of South Africa

Abstract

Feed utilization, calcium and phosphorus metabolism and serum protein fractions were studied in Merino lambs suffering from acute trichostrongylosis before and after treatment with an anthelmintic. Five of 11 lambs were infected with 50,000 Trichostrongylus colubriformis larvae; thiabendazole (100 mg/kg) was administered 105 days later. Though high fecal worm egg counts were present in infected lambs, no eggs were found after treatment. Both anorexia and depressed growth rate in infected lambs were alleviated by the treatment and there were signs of a compensatory growth effect in the previously infected animals during the recovery period. Both the absorption (percent of intake) and serum levels of calcium and phosphorus were depressed in infected lambs, but these values returned to normal within 28 days after treatment. Signs of hypoalbuminemia, hypergamma- and hyperbetaglobulinemia in infected lambs were no longer evident 42 days after doxing with thiabendazole. This evidence indicates that acute trichostrongylosis in lambs is characterized by a capacity for complete regeneration of affected tissues following successful anthelmintic treatment.

Footnotes

1 This study was supported by the University of Pretoria (NPK Fund) and Merck Sharpe and Dohme (Pty) Ltd., South Africa.

2 Present address: Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Can. S7N 0W0.






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Copyright © 1977 by the American Society of Animal Science.