| Summary: | The article is presented many scientific papers, which comprehensively covered violations of D-vitamin and phosphorus-calcium metabolism devoted to pathology of metabolism in young cattle. A characteristic feature of most of these diseases is that they are mostly hidden the stage of flow at which the developing pathobiochemical disorders, back even to the stage of pathognomonic symptoms.
The aim of the work was to study the distribution, etiology, clinical and biochemical status of calves with D-hypovitaminosis in one of the farms in Zhytomyr Polissya region. As the materials for the study there were used clinically healthy and 1-3 months old calves with clinical signs of rickets. There were studied keeping and feeding conditions of animals. There were conducted clinical and experimental studies. Diagnosis and distribution of D-hypovitaminosis in 1–3 months old calves have been studied using clinical and laboratory methods. It was established that D-hypovitaminosis in calves is widespread on the farm. There was found that 45.8% of animals showed subclinical course and 24.1% – clinical course of the disease. The pathology was more often recorded during the winter and spring time. The main etiological factors of the disease in calves there were hypodynamia and insufficient insolation of animals, low availability of cholecalciferol (25.8 %), impaired calcium-phosphorus ratio (2.7–4.2: 1 vs. normal values 1.5–2.0:1), deficiency of trace elements – Cobalt, Zinc, Copper, which were provided 57,6, 85,6 and 96,2 % of the need, respectively. Characteristic symptoms of the disease in calves are suckering, allotriophagia, thickening of the wrist joints, partial resorption of the last ribs and tail vertebrae, shaky teeth. The most informative laboratory tests for the diagnosing of the rickets are the determination in blood serum of cholecalciferol, total calcium, inorganic phosphorus, alkaline phosphatase activity and its bone isoenzyme.
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