Reinecke, R.K.Collins, H. MariaAnderson, P.J.S.South Africa. Dept. of Agricultural Technical ServicesDe Lange, M.Reinecke, R.K.Walker, Jane B.De Kock, V.E.Howell, P.G.2015-11-302015-11-3020151971Reinecke, RK, Collins, HM & Anderson, PJS 1971, 'Studies on Dictyocaulus filaria. III. The migration of the immature stages applied to an anthelmintic test’, Onderstepoort Journal of Veterinary Research, vol. 38, no. 3, pp. 191-7.http://hdl.handle.net/2263/50984The journals have been scanned in colour with a HP 5590 scanner; 600 dpi. Adobe Acrobat v.11 was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.The larvae of Dictyocaulus filaria (Rudolphi, 1809) develop to the 5th stage in the mesenteric lymph nodes within 6 to 8 days of infestation. The migration of the 5th stage to the lungs commences on the 7th or 8th day and is almost complete by the 13th day. The adult females start laying eggs in the bronchi from the 28th day. Controlled anthelmintic tests on two groups of sheep are described. Levamisole was dosed intraruminally at 7,5 mg/kg. It was tested against the 3rd and 4th stage larvae in the lymph nodes in the 1st group and against the 5th stages in the lungs in the 2nd group of animals. In both cases data assessed by the non-parametric statistical method showed that levamisole could be classified in Class B, i.e. it was more than 60 per cent effective in more than 60 per cent of the treated flock.en©South Africa. Dept. of Agricultural Technical Services (original). ©University of Pretoria. Dept. of Library Services (digital).Veterinary medicineSouth AfricaVeterinary medicine -- South AfricaArticle