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Preclinical Diagnosis of Metabolic Osteopathy in Fattened Bulls

DOUBEK J, ILLEK J, ONDRACEK J
Veterinarni Medicina 39, 1994, 231-243

Diagnostic significance of some clinico-biochemical parameters was investigated in 221 fattened bulls. An evaluation of the results has shown that the determination of concentrations of calcium, inorganic phosphorus and alkaline phosphatase activity in blood Plasma was not of essential importance for diagnostics. The values of these parameters were within the reference range (Tab. I). The parameters determined by chemical analyses of bioptates from the tuber coxae of the fattened bulls with various forms of alimentary osteopathy showed characteristics, statistically significant differences in comparison with the control animals (Tabs. II, III, IV). In the bulls of group B/1 (clinically healthy, phosphorus deficit in the feed ration, acidogenic nutrition in part of the animals, lowered performance, occurrence of clinical cases of osteopathy in fattening facilities), a significant decrease in the values of ash per 1 g fat-free dry matter and per 1 cm3 spongy substance of the t. coxae and a significantly wider index Ca/P were determined. In the bulls of group B/2 (clinically healthy, deficit of phosphorus, calcium, proteins and energy in the feed ration, decreased performance, occurrence of clinical osteopathy), a significant decrease of ash per 1 g fat-free dry matter and per 1 cm3 of spongy substance of the t. coxae was determined, the Ca/P index was significantly narrower. In the bulls of group C/1 (bulls with clinical symptoms of skeleton disorder, phosphorus deficit in the feed ration, acidogenic nutrition in part of the animals), a significant decrease of ash per 1 g far-free dry matter and per 1 cm3 spongy substance of the t. coxae was found out, the Ca/P index was wider. In the bulls of group C/2 (bulls with clinical symptoms of skeleton disorder, deficit of phosphorus, calcium, protein and energy in the feed ration), a significant decrease in ash per 1 g fat-free dry matter and per 1 cm3 of spongy substance of the t. coxae and narrowed Ca/P index were determined. Histological examination of osteobioptates confirmed the pathognomy of these differences with respect to the process taking place in the skeleton. Rachotoc lesions could be diagnosed from the determination of ash weight per 1 g fat-free dry matter,porotic lesions in the skeleton were diagnosed from the determination of ash per 1 cm3 spongy substance of the t. coxae. The Ca/P index in bone ash reflected the longer-time situation of these elements in feed, and it was possible to specify the disorder on the basis of this index. Complex examination of the fattened bulls demonstrated applicability of some parameters of the spongy substance determined by chemical analysis to pre-clinical diagnostics of metabolic disorders of the skeleton


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