Reinecke, R.K.Bruckner, ChristelDe Villiers, I.L.Bigalke, R.D.Cameron, Colin McKenzieGilchrist, Frances M.C.Jordaan, E.Morren, A.J.Verster, Anna J.M.Verwoerd, Daniel WynandWalker, Jane B.Steyn, P.J.J.2015-12-072015-12-0720151982Reinecke, RK, Bruckner, C & De Villiers, IL 1982, 'Studies on Haemonchus contortus. VII. The effect of treatment of Trichostrongylus axei prior to challenge with H. contortus’, Onderstepoort Journal of Veterinary Research, vol. 49, no. 1, pp. 69.0330-2465http://hdl.handle.net/2263/51094The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.Four-month-old worm-free Merino lambs were dosed with 20 000 infective larvae of Trichostrongylus axei on Day 0 and again on Day +14. On Day +83 they were treated with mebendazole at 15 mg/kg. All lambs in this group and a further group of 11 worm-free Merino control lambs were challenged with 50 000 infective larvae of Haemonchus contortus dosed from Day +90 - Day +92. At necropsy 27 and 28 days later there was no significant difference between the worm burdens of the 2 groups. T. axei must be present in the abomasum to protect sheep from challenge with H. contortus.en©ARC - Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). ©University of Pretoria. Dept. of Library Services (digital).Veterinary medicineVeterinary medicine -- South AfricaArticle