title: [The effect of hypervitaminosis D3 on the bones of the chicken. 2. Electron microscopic studies].
abstract: In an experiment of 36 days duration 46 one-day-old chicks were divided into 5 groups and fed with different concentrations of vitamin D3. The animals of the group which lacked vitamin D3, showed the typical rachitic lesions. After a 15 days lack of vitamin D3 the chicks of another group were treated with standard food (2000 I.U. vitamin D3/kg food) with the consequence of an approximation of the analyzed parameters to those of the control group within 3 weeks. When fed with 60,000 I.U. of vitamin D3 after a 15 days lack of this vitamin, the animals showed an over-hasty healing process, ending up with signs of intoxication which were even more conspicuous when fed with 120,000 I.U. of vitamin D3. Besides an increasing calcification of osteoblasts and endothelial cell membranes as well as a degeneration of osteoblasts, a clear increase of eosinophilic granulocytes could be noticed. In all groups free erythrocytes within the ground substance were found. There was no evidence of necroses of osteocytes or of bone.
authors.affiliation: Institut für Pathologie und Gerichtliche Veterinärmedizin der Veterinärmedizinischen, Universität Wien.
authors.forename: H
authors.initials: H
authors.lastname: Bacowsky
authors.forename: H
authors.initials: H
authors.lastname: Krempl
authors.forename: D S
authors.initials: DS
authors.lastname: Regal
mesh_terms: D000821:Animal Feed; D000818:Animals; D001842:Bone and Bones / Q000473:pathology* / Q000648:ultrastructure; D002645:Chickens; D002762:Cholecalciferol / Q000008:administration & dosage* / Q000172:deficiency; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D011201:Poultry Diseases / Q000473:pathology*; D014808:Vitamin D Deficiency / Q000473:pathology / Q000662:veterinary*
chemical_list: D002762:Cholecalciferol
vernacular_title: Untersuchungen über die Auswirkungen einer hypervitaminose D3 im Knochen des Huhnes.