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This case report describes the pathological findings of multiple congenital cardiac defects in a 2-year-old female Shetland pony with clinical signs of chronic respiratory distress. Persistent truncus arteriosus (PTA) type IV, interventricular septal defect, overriding aorta, pulmonary trunk agenesis, pulmonary arteries arising from the descending aorta, and compensatory right ventricular hypertrophy were observed.

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Acta Veterinaria Hungarica
Authors: Csaba Attila Kósa, Krisztina Nagy, Ottó Szenci, Boglárka Baska-Vincze, Emese Andrásofszky, Róbert Szép, Ágnes Keresztesi, Mircea Mircean, Marian Taulescu, and Orsolya Kutasi

Abstract

A severe form of recurrent exertional rhabdomyolysis occurs enzootically in a well-defined region of Transylvania, Harghita county. At the highest lying two settlements (more than 800 m above sea level), the prevalence of equine rhabdomyolysis is between 17 and 23%, while in the neighbouring villages in the valley it is less than 2%. The objective of our study was to clarify the role of selenium and vitamin E in the high prevalence of rhabdomyolysis in that region. Soil and hay samples were collected from each area to evaluate mineral content. Ten horses from the non-affected and 20 horses from the affected area were tested for serum selenium, vitamin E, glutathione peroxidase (GSH-Px), muscle enzymes, lactate and electrolytes. Hay samples collected from the affected area had lower selenium content. Horses in the affected regions had significantly lower serum selenium (P = 0.006) and GSH-Px levels than animals living in the non-affected regions. A good correlation between erythrocyte GSH-Px and serum selenium concentration could be demonstrated (r = 0.777, P < 0.001). Serum vitamin E levels were low independently of the origin of the horse. Based on our results, selenium deficiency possibly has a role in the Transylvanian enzootic equine recurrent rhabdomyolysis syndrome.

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