Fecha/hora: 03/06/2024 08:42:38

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	21/01/2020	
Fecha de la última actualización: 	21/01/2020	
Autoria: 	DE CARVALHO NUNES, L.; STEGELMEIER, B. L.; COOK, D.; PFISTER, J. A.; GARDNER, D. R.; RIET-CORREA, F.; WEICH, K. D.	
Afiliación: 	LOUISIANE DE CARVALHO NUNES, Department of Veterinary Science, Federal University of Espírito Santo, Alegre, Espírito Santo, Brazil; BRYAN L. STEGELMEIER, USDA-ARS Poisonous Plant Research Laboratory, USA; DANIEL COOK, USDA-ARS Poisonous Plant Research Laboratory, USA; JAMES A. PFISTER, USDA-ARS Poisonous Plant Research Laboratory, USA; DALE R. GARDNER, USDA-ARS Poisonous Plant Research Laboratory, USA; FRANKLIN RIET-CORREA AMARAL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Veterinary Hospital, Center for Health and Rural Technology, Patos Campus, Federal University of Campina Grande, Brazil; KEVIN D. WELCH, USDA-ARS Poisonous Plant Research Laboratory, USA.	
Título: 	Clinical and pathological comparison of Astragalus lentiginosus and Ipomoea carnea poisoning in goats.	
Año de publicación: 	2019	
Fuente/Imprenta: 	Toxicon, 5 December, 2019, Volume 171, Pages 20-28. Doi: 10.1016/j.toxicon.2019.09.016	
ISSN: 	0041-0101	
DOI: 	10.1016/j.toxicon.2019.09.016	
Idioma: 	Inglés	
Notas: 	Article history: Received 12 July 2019; Received in revised form 12 September 2019; Accepted 16 September 2019; Available online 19 September 2019.	
Contenido: 	ABSTRACT.
The indolizidine alkaloid swainsonine, found in some Astragalus and Oxytropis (i.e., locoweed) species, is a potent cellular glycosidase inhibitor that often poisons livestock. Other toxic genera such as some Ipomoea species also contain swainsonine as well as calystegines which are similar polyhydroxy alkaloids. The toxicity of calystegines is poorly characterized; however, they are also potent glycoside inhibitors capable of intestinal and cellular glycoside dysfunction. The objective of this study was to directly compare A. lentiginosus and I. carnea poisoning in goats to better characterize the role of the calystegines. Three groups of four goats each were treated with ground alfalfa (control), I. carnea or A. lentiginosus to obtain daily doses of 0.0, 1.5, and 1.5 mg swainsonine/kg bw per day, respectively, for 45 days. Animals were observed daily and weekly body weights, serum enzyme activities, and serum swainsonine concentrations were determined. At day 45 all animals were euthanized and necropsied. Goats treated with A. lentiginosus and I. carnea developed clinical disease characterized by mild intention tremors and proprioceptive deficits. Goats treated with A. lentiginosus developed clinical disease sooner and with greater consistency. No differences in body weight, serum swainsonine concentrations and serum enzyme activity were observed between goats treated with A. lentiginosus and I. carnea. Additionally, there were no differences in the microscopic and histochemical studies of the visceral and neurologic lesions observed between goats treated with A. lentiginosus and I. carnea. These findings suggest that I. carnea-induced clinical signs and lesions are due to swainsonine and that calystegines contribute little or nothing to toxicity in goats in the presence of swainsonine. 
© 2019	
Palabras-Clave: 	Astragalus; Calystegines; Ipomoea; Locoweed; PLATAFORMA SALUD ANIMAL; Swainsonine.	
Categoría del tema: 	A50 Investigación agraria	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102097-1) - PXI - AP - DD - PP/TOXICON/2019 -  -  - DIS