Fatal Wedelia glauca Intoxication in Calves Following Natural Exposure

A group of 342 beef calves, corralled in the Patagonia region of Argentina, were fed alfalfa hay that had been inadvertently contaminated with Wedelia glauca. A total of 147 (43%) calves died within 4 days. Pathologic findings in 2 calves were diffuse centrilobular hepatic necrosis and hemorrhage wi...

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Bibliographic Details
Published in:	Veterinary pathology Vol. 50; no. 3; pp. 530 - 533
Main Authors:	Giannitti, F., Margineda, C. A., Cid, M. S., Montobbio, C., Soteras, C. I., Caffarena, R. D., Diab, S. S.
Format:	Journal Article
Language:	English
Published:	Los Angeles, CA SAGE Publications 01-05-2013
Subjects:	Animal Feed Animals Argentina - epidemiology Bile Duct Diseases - etiology Bile Duct Diseases - pathology Bile Duct Diseases - veterinary Cattle Cattle Diseases - economics Cattle Diseases - etiology Cattle Diseases - pathology Disease Outbreaks - veterinary Diterpenes - poisoning Edema - etiology Edema - pathology Edema - veterinary Female Gallbladder Diseases - etiology Gallbladder Diseases - pathology Gallbladder Diseases - veterinary Hemorrhage - etiology Hemorrhage - pathology Hemorrhage - veterinary Liver - pathology Liver Diseases - etiology Liver Diseases - pathology Liver Diseases - veterinary Male Medicago sativa Necrosis - veterinary Plant Poisoning - mortality Plant Poisoning - pathology Plant Poisoning - veterinary Plants, Toxic - chemistry Plants, Toxic - poisoning Rumen - pathology Wedelia - chemistry Wedelia - poisoning Argentina Argentina wedeloside poisoning liver hepatotoxic plants cattle Wedelia glauca atractyloside
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Summary:	A group of 342 beef calves, corralled in the Patagonia region of Argentina, were fed alfalfa hay that had been inadvertently contaminated with Wedelia glauca. A total of 147 (43%) calves died within 4 days. Pathologic findings in 2 calves were diffuse centrilobular hepatic necrosis and hemorrhage with edema in the gallbladder, common bile duct, and choledochoduodenal junction. Epidermal fragments of W. glauca were identified in rumen contents by microscopy. Intact W. glauca plants and leaf fragments were found in the hay. Patches of defoliated W. glauca were also identified in the alfalfa pasture from which the hay had been baled.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0300-9858 1544-2217
DOI:	10.1177/0300985812469634