Haemonchus contortus with low inhibited development in sheep from the highveld of Zimbabwe |
| |
| Authors: | V S Pandey |
| |
| Institution: | Department of Paraclinical Veterinary Studies, Faculty of Veterinary Science, University of Zimbabwe, Harare. |
| |
| Abstract: | The abomasa of sheep grazing on natural pastures in the highveld of Zimbabwe were examined for Haemonchus contortus. Of 304 abomasa, 213 (70%) harboured H. contortus. The worm burden increased during the rains to reach the peak in February-March. This was followed by a decline with low worm loads throughout the dry season. The fourth stage larvae (L4) accounted for 1-7% of the total H. contortus population, except during July and August when they comprised 22 and 54% of the worm burden, respectively. It appears that the inhibition of H. contortus is not common in the commercial farming sector where sheep are treated very frequently. |
| |
| Keywords: | |
|
|
