Data/hora: 19/06/2024 02:51:51

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 05/10/2018
Data da última atualização: | 05/10/2018
Autoria: | PANZIERA, W.; PAVARINI S. P.; SONNE, L.; BARROS, C. S. L.; DRIEMEIER, D.
Afiliação: | Welden Panziera, Setor de Patologia Veterinária/Departamento de Patologia Clínica Veterinária/Faculdade de Veterinária/Universidade Federal do Rio Grande do Sul - UFRGS; Saulo P. Pavarini, Setor de Patologia Veterinária/Departamento de Patologia Clínica Veterinária/Faculdade de Veterinária/Universidade Federal do Rio Grande do Sul - UFRGS; Luciana Sonne, Setor de Patologia Veterinária/Departamento de Patologia Clínica Veterinária/Faculdade de Veterinária/Universidade Federal do Rio Grande do Sul - UFRGS; Claudio S. L. Barros, Laboratório de Anatomia Patológica/Faculdade de Medicina Veterinária e Zootecnia/Universidade Federal de Mato Grosso do Sul - UFMS; David Driemeier, Setor de Patologia Veterinária/Departamento de Patologia Clínica Veterinária/Faculdade de Veterinária/Universidade Federal do Rio Grande do Sul - UFRGS.
Título: | Poisoning of cattle by Senecio spp. in Brazil: a review.
Ano de publicação: | 2018
Fonte/Imprenta: | Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 38, n. 8, p. 1459-1470, agosto 2018
Idioma: | Inglês
Notas: | Título em português: Intoxicação por Senecio spp. em bovinos no Brasil: revisão de literatura.
Conteúdo: | Poisoning of cattle by plants of the Senecio genus represents an important cause of death in cattle and has important economic repercussions in southern Brazil. This review is intended to provide a detailed review of Senecio spp. intoxication in cattle and addresses issues regarding the toxic principle and pathogenesis of the disease caused by these plants and the epidemiology, clinical signs, diagnosis, control and prophylaxis of the disease. Senecio brasiliensis is the main species associated with natural intoxication of livestock in Brazil, and the number of cases associated with the ingestion of S. madagascariensis is increasing. The toxic principle of Senecio spp. comprises the hepatotoxic alkaloids of the pyrrolizidine group (pyrrolizidine alkaloids, PAs). The resulting liver lesions are chronic and irreversible and result from the inhibition of hepatocellular mitosis. Deaths of adult cattle may occur both sporadically and in larger outbreaks over an extended period of time. In cattle raising, Senecio spp. are consumed mainly during the winter, when there is a dearth of forage; at this time the poisonous Senecio species are budding and contain high concentrations of PAs. Spontaneous Senecio spp. intoxication in cattle is a chronic condition that frequently involves acute clinical manifestations. Affected cattle may present ascites, emaciation, intermittent dark diarrhea, tenesmus, rectal prolapse, and neurological signs resulting from hepatic encephalopathy. Hepatogenous photosensitization may be observed but is uncommon. Necropsy findings include dependent subcutaneous edema, ascites, and edema of the mesentery, abomasal folds, and gallbladder. The liver is firm, normal or reduced in size with a white, thick capsule. Microscopically, the hallmarks of Senecio-associated disease are varying degrees of hepatocellular megalocytosis, bile duct hyperplasia and fibrosis. Sheep are significantly more resistant to Senecio intoxication than are cattle and avidly ingest Senecio plants; therefore, the use of sheep for grazing infested pasture is recommended for preventing the associated disease in cattle.
Palavras-Chave: | Diseases of cattle; Intoxications; Senecio spp.
Thesagro: | Bovino; Intoxicação; Ovino; Planta Tóxica.
Thesaurus Nal: | Brazil; Cattle; Plant poisoning; Poisonous plants.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/183987/1/Poisoning-of-cattle-by-Senecio-spp..pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (63106-1) - UPE - AP - DD -  -  -  - DIS