Ultrastructural changes in Brown Swiss cattle affected with bovine progressive degenerative myeloencephalopathy (Weaver syndrome).
Thirty Brown Swiss cattle, 7 to 30 months old, clinically affected with the weaver syndrome and five clinically normal Brown Swiss were studied. Ultrastructural examination mainly of the thoracic spinal cord revealed axonal changes accompanied by degeneration of myelin sheaths that were fragmented and lamellae vesiculated. The degeneration was accompanied by moderate gliosis and phagocytosis of degenerated myelin. There were no inflammatory changes. The ultrastructural changes may represent a disturbance of axoplasmic transport and subsequent axonal degeneration.
el Hamidi
M
M
Department of Pathology, College of Veterinary Medicine, Kansas State University, Manhattan 66506.
Leipold
H W
HW
Cook
J E
JE
D000818:Animals; D001369:Axons / Q000648:ultrastructure; D002417:Cattle; D002418:Cattle Diseases / Q000473:pathology*; D002493:Central Nervous System Diseases / Q000473:pathology / Q000662:veterinary*; D008854:Microscopy, Electron; D009186:Myelin Sheath / Q000648:ultrastructure; D013116:Spinal Cord / Q000648:ultrastructure*; D013577:Syndrome