Verwoerd, Daniel Wynand2014-01-272014-01-2720131993Groenewald, HB 1993, 'Ultrastructure of the myenteric ganglia in the rumen, reticulum, omasum and abomasum of grey, white and black Karakul lambs.’, Onderstepoort Journal of Veterinary Research, vol. 60, no. 3, pp. 189-195.0330-2465http://hdl.handle.net/2263/33108The 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.Homozygous grey and white Karakul lambs die after they have reached weaning age. This is due to a lethal gene causing digestive disturbances. Previous studies revealed that grey and white lambs have large, milk-filled rumens; the phenomenon was attributed to a significant decrease in the number of myenteric ganglia and neurons in the rumen wall. This study was undertaken to determine whether any morphological differences exist in the ultrastructure of the myenteric ganglia in the forestomach and abomasum of grey, white and black Karakul lambs. Samples of the forestomach and abomasum of grey, white and black Karakul lambs were prepared routinely for electron microscopy and studied with a Phillips electron microscope. No morphological differences could be detected in the structure of the components of the myenteric ganglia in the forestomachs and abomasums of grey, white and black Karakul lambs. It was therefore concluded that the lethal gene in grey and white Karakul lambs results in a paucity of the myenteric ganglia, but does not affect the ultrastructure of these structures.en© ARC-Onderstepoort (original). © University of Pretoria. Dept of Library Services (digital).Veterinary medicineVeterinary medicine -- South AfricaArticle