Yellow oat grass intoxication in horses: Pitfalls by producing hay from extensive landscapes? A case report

Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere
F BockischI Vervuert

Abstract

Vitamin-D intoxication by yellow oat grass is often reported under the syndrome of enzootic calcinosis in ruminants in the upper regions of the Alps. The intake of Trisetum flavescens in ruminants and horses induces calcification of soft tissue, including vessels, tendons and ligaments, lung, heart and kidneys. Clinical symptoms, including a reluctance to move, inappetence, body-weight loss and impaired organ function, are frequently observed. To date, there are only a very few case reports about yellow-oat-grass intoxication in horses. The present case report describes Vitamin-D intoxication by yellow oat grass in a riding stable in Thuringia, Germany. The horses, which were fed hay with a 50% contamination of Trisetum flavescens, displayed symptoms, including inappetence, body-weight loss, colic, polydipsia and polyuria. The hay, contaminated with Trisetum flavescens, was harvested from an extensively cultivated landscape according to the European Fauna-Flora-Habitat (FFH)-directive. The present case report demonstrates the pitfalls in producing hay from extensively used landscapes and indicates some peculiarities of Vitamin-D metabolism in horses.

References

Aug 1, 1974·Zentralblatt für Veterinärmedizin. Reihe A·E MuylleC Van Den Hende
Jul 1, 2004·The Journal of Steroid Biochemistry and Molecular Biology·Johein Harmeyer, Christina Schlumbohm
Oct 15, 2013·Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association·Jocelyn Habershon-ButcherGayle Hallowell

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Citations

Nov 25, 2016·Animal : an International Journal of Animal Bioscience·P A HarrisI Vervuert
Oct 30, 2020·BMC Veterinary Research·Matthias Gerhard WagenerMartin Ganter

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