Related Experiment Video
Updated: May 14, 2026

How to Create Conditioned Taste Aversion for Grazing Ground Covers in Woody Crops with Small Ruminants
Published on: April 30, 2016
Fatal Wedelia glauca intoxication in calves following natural exposure
F Giannitti1, C A Margineda, M S Cid
1California Animal Health and Food Safety (CAHFS) Laboratory System, University of California, West Health Sciences Drive, Davis, CA 95616, USA. fgiannitti@ucdavis.edu
Abstract:
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.
More Related Videos
06:02A Contemporary Warming/Restraining Device for Efficient Tail Vein Injections in a Murine Fungal Sepsis Model
Published on: November 6, 2020
09:01The Bovine Lung in Biomedical Research: Visually Guided Bronchoscopy, Intrabronchial Inoculation and In Vivo Sampling Techniques
Published on: July 3, 2014
Related Concept Videos
Toxicity Testing in Animals
Anticholinesterase Agents: Poisoning and Treatment
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is slower than the...
Drug Toxicity: Allergic Reactions