Schneider, D.J.Bigalke, R.D.Cameron, Colin McKenzieGilchrist, Frances M.C.Morren, A.J.Verster, Anna J.M.Verwoerd, Daniel WynandWalker, Jane B.Steyn, P.J.J.2016-03-152016-03-1520161981Schneider, DJ 1981, 'First report of annual ryegrass toxicity in the Republic of South Africa’, Onderstepoort Journal of Veterinary Research, vol. 48, no. 4, pp. 251-255.0330-2465http://hdl.handle.net/2263/51875The 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.The occurrence of annual ryegrass toxicity (ARGT) in sheep and cattle is reported for the first time in South Africa. To date it has been diagnosed conclusively in South African Mutton Merino sheep on a farm in the Caledon district and in cattle on 3 farms, 2 of which are situated in the Bredasdorp district and 1 in the Ceres district. It is a neurological disease characterized by symptoms of tremor, ataxia, intermittent epileptiform seizures, nystagmus, opisthotonus, abortions and high mortality. The history, clinical signs and experimental reproduction of the disease as well as the pathology of 4 experimental and 10 natural cases in sheep and 2 in cattle are described.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