Parasites of domestic and wild animals in South Africa. V. Helminths in sheep on dryland pasture on the Transvaal Highveld

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Authors

Horak, Ivan Gerard

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The Government Printer, Pretoria

Abstract

The seasonal incidence of helminth infestation on a farm in the Transvaal Highveld was determined by the slaughter of tracer lambs exposed on pasture for periods of approximately 6 weeks. Haemonchus contortus, the most prevalent nematode, was recovered in the greatest numbers from January- May 1974. Peak counts of Ostertagia circumcincta were made during March and April 1974 and in January 1975, while Trichostrongylus spp. were mainly encountered from March-June. Cooperia spp. were generally recovered from November-May and Moniezia expansa from October-April. H. contortus, O. circumcincta and Cooperia spp. all exhibited increasing degrees of arrested development in the 4th larval stage from February-June.

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Keywords

Veterinary Medicine

Sustainable Development Goals

Citation

Horak, IG 1978, 'Parasites of domestic and wild animals in South Africa. V. Helminths in sheep on dryland pasture on the Transvaal Highveld’, Onderstepoort Journal of Veterinary Research, vol. 45, no. 1, pp. 1-6.