Clinical, pathological and ultrastructural changes in rats injected ip with extracts of Wedelia glauca are described. Macroscopic changes were congested livers with accentuated centrilobular vascular patterns. Microscopic hepatic lesions had variable degrees of degeneration and lytic necrosis of centrilobular hepatocytes. Ultrastructural liver changes were condensation of nuclear chromatin with loss of perinuclear membranes, enlargement of mitochondria with alteration of limiting membranes, disappearance of cristae and matrical rarefaction. The endoplasmic reticulum was dilated with detachment of ribosomes. Serum activities of aspartate aminotransferase, alanine aminotransferase and lactate dehydrogenase were increased.
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Vet Pathol
May 2013
California Animal Health and Food Safety (CAHFS) Laboratory System, University of California, West Health Sciences Drive, Davis, CA 95616, USA.
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.
View Article and Find Full Text PDFJ Vet Diagn Invest
November 2012
California Animal Health and Food Safety Laboratory System, University of California, Davis, CA, USA.
The current study describes a naturally occurring cluster of cases of Wedelia glauca intoxication. Seven of 14 axis deer (Axis axis) and 1 of 8 llamas (Lama glama) in a zoo of Buenos Aires province, Argentina, died suddenly after ingestion of a new batch of alfalfa (Medicago sativa) hay bales contaminated with the hepatotoxic plant W. glauca.
View Article and Find Full Text PDFJ Econ Entomol
June 2005
Catedra de Apicultura, Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Argentina.
The repellent and acaricidal effects of some essential oils from the most typical wild plant species of northern Patagonia, Argentina, on Varroa destructor Anderson & Trueman were evaluated using a complete exposure test. Honey bees, Apis mellifera L., and mites (five specimens of each per dish) were introduced in petri dishes having different oil concentrations (from 0.
View Article and Find Full Text PDFVet Hum Toxicol
June 1996
Facultad de Veterinaria, Universidad de la Republica, Salto, Uruguay.
Wedelia glauca was administered experimentally to 11 sheep and 4 cattle. The minimum toxic dose for both species was of 4 to 5 g of fresh plant/kg bw. Clinical signs were depression, muscle fasciculations, increased respiratory and cardiac frequencies, opisthotonous, sternal or lateral recumbency and terminal paddling movements.
View Article and Find Full Text PDFVet Hum Toxicol
February 1996
Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Argentina.
Clinical, pathological and ultrastructural changes in rats injected ip with extracts of Wedelia glauca are described. Macroscopic changes were congested livers with accentuated centrilobular vascular patterns. Microscopic hepatic lesions had variable degrees of degeneration and lytic necrosis of centrilobular hepatocytes.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!