Gossypol toxicity in preruminant calves

Australian Veterinary Journal
R Z ZelskiD J Kennedy

Abstract

Twenty-four of 57 calves fed a diet containing 33% cotton seed meal (CSM) died between 7 and 15 weeks of age. Initial deaths were not accompanied by premonitory signs, but after CSM withdrawal most calves developed rough coats, anorexia, weakness, ascites and subcutaneous oedema. Those that died had large volumes of serous fluid in the body cavities, hard livers of 'nutmeg' appearance, and pulmonary congestion. Histopathologically the livers showed periacinar necrosis in acute cases and periacinar fibrosis in chronic cases. Lungs from several calves had oedema, haemosiderosis and fibrosis in some pulmonary vessels. Atrophy of myocardial fibres was present in most cases. The concentration of free gossypol in the diet was 100 to 220 mg/kg. Ante-mortem and post-mortem findings supported a diagnosis of gossypol poisoning. The deaths continued for 4 weeks after withdrawal of CSM from the diet.

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Citations

Jun 22, 2002·Toxicon : Official Journal of the International Society on Toxinology·J-S ChengC-R Jan
Sep 19, 2002·The Veterinary Clinics of North America. Food Animal Practice·Glenn M RogersJoe C Paschal
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Aug 10, 2000·Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology·M N PrimeauA Clarke

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