Artigo

Brachiaria spp. poisoning of ruminants in Brazil

Brachiaria species are the most important grasses for cattle production in Brazil. However, a limiting factor for the use of Brachiaria spp. is their toxicity. Most outbreaks of hepatogenous photosensitization are caused by B. decumbens; however B. brizantha, B. humidicola and B. ruziziensis can als...

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Autor principal: RIVERO, Beatriz Riet Correa
Outros Autores: CASTRO, Márcio Botelho de, LEMOS, Ricardo Antônio Amaral de, CORREA, Gabriela Riet, MUSTAFA, Vanessa da Silva, CORREA, Franklin Riet
Grau: Artigo
Idioma: eng
Publicado em: 2013
Assuntos:
Acesso em linha: http://repositorio.ufpa.br/jspui/handle/2011/3889
id ir-2011-3889
recordtype dspace
spelling ir-2011-38892018-01-18T16:40:02Z Brachiaria spp. poisoning of ruminants in Brazil Intoxicação por Brachiaria spp. em ruminantes no Brasil RIVERO, Beatriz Riet Correa CASTRO, Márcio Botelho de LEMOS, Ricardo Antônio Amaral de CORREA, Gabriela Riet MUSTAFA, Vanessa da Silva CORREA, Franklin Riet Planta tóxica Brachiaria spp Bovino Ovinos Caprinos Bubalinos Resiliência psicológica Brasil - País Brachiaria species are the most important grasses for cattle production in Brazil. However, a limiting factor for the use of Brachiaria spp. is their toxicity. Most outbreaks of hepatogenous photosensitization are caused by B. decumbens; however B. brizantha, B. humidicola and B. ruziziensis can also cause poisoning. The poisoning affects cattle, sheep, goats and buffalo. Sheep are more susceptible than other animal species and the young are more susceptible than adults. There are differences in susceptibility among animals of the same species and it has been suggested that this resistance is genetic. Also has been suggested that buffalo and probably some sheep are resilient, i.e. when poisoned these animals have histologic lesions and high GGT serum concentrations, but do not show clinical signs. In general, saponin concentrations are higher in growing plants, but outbreaks occur all over the year, probably due to unexplained rise in saponin concentration in the plant. A clinical syndrome of progressive weight loss and death, without photosensitization, has been reported in cattle poisoned by B. decumbens. Main preventive measures are based on the selection of resistant or resilient animals and on the development of Brachiaria species or varieties with low saponin concentration. Brachiaria spp. são as forrageiras mais importantes para a pecuária brasileira. Entretanto, um fator limitante para sua utilização é a sua toxicidade. A maioria dos surtos de fotossensibilização hepatógena é causada por Brachiaria decumbens; porém, B. brizantha, B. humidicola e B. ruziziensis podem também causar intoxicação. A intoxicação afeta bovinos, ovinos, caprinos e bubalinos. Os ovinos são mais susceptíveis que as outras espécies, e os animais jovens são mais susceptíveis que os adultos. Existem diferenças na susceptibilidade entre animais da mesma espécie e tem sido sugerido que esta resistência é genética. Sugere-se, também, que búfalos e provavelmente alguns ovinos são resilientes (quando intoxicados apresentam lesões histológicas e aumento das concentrações séricas de GGT, mas não apresentam sinais clínicos). Em geral, a concentração de saponinas é maior nas plantas em crescimento, mas surtos ocorrem durante todo o ano, provavelmente por aumento da concentração de saponinas na planta por alguma causa ainda desconhecida. Uma síndrome clínica com progressiva perda de peso e morte, sem fotossensibilização, tem sido descrita em bovinos intoxicados por B. decumbens. As principais medidas preventivas são baseadas na seleção de animais resistentes ou resilientes e o desenvolvimento de espécies ou variedades de Brachiaria com menores concentrações de saponinas. 2013-05-22T13:27:29Z 2013-05-22T13:27:29Z 2011-03 Artigo de Periódico RIET-CORREA, B., et al. Brachiaria spp. poisoning of ruminants in Brazil. Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 31, n. 3, p. 183-192, mar. 2011. Disponível em: <http://www.scielo.br/pdf/pvb/v31n3/01.pdf>. Acesso em: 21 maio 2013. <http://dx.doi.org/10.1590/S0100-736X2011000300001>. 1678-5150 0100-736X http://repositorio.ufpa.br/jspui/handle/2011/3889 eng Acesso Aberto application/pdf
institution Repositório Institucional - Universidade Federal do Pará
collection RI-UFPA
language eng
topic Planta tóxica
Brachiaria spp
Bovino
Ovinos
Caprinos
Bubalinos
Resiliência psicológica
Brasil - País
spellingShingle Planta tóxica
Brachiaria spp
Bovino
Ovinos
Caprinos
Bubalinos
Resiliência psicológica
Brasil - País
RIVERO, Beatriz Riet Correa
Brachiaria spp. poisoning of ruminants in Brazil
topic_facet Planta tóxica
Brachiaria spp
Bovino
Ovinos
Caprinos
Bubalinos
Resiliência psicológica
Brasil - País
description Brachiaria species are the most important grasses for cattle production in Brazil. However, a limiting factor for the use of Brachiaria spp. is their toxicity. Most outbreaks of hepatogenous photosensitization are caused by B. decumbens; however B. brizantha, B. humidicola and B. ruziziensis can also cause poisoning. The poisoning affects cattle, sheep, goats and buffalo. Sheep are more susceptible than other animal species and the young are more susceptible than adults. There are differences in susceptibility among animals of the same species and it has been suggested that this resistance is genetic. Also has been suggested that buffalo and probably some sheep are resilient, i.e. when poisoned these animals have histologic lesions and high GGT serum concentrations, but do not show clinical signs. In general, saponin concentrations are higher in growing plants, but outbreaks occur all over the year, probably due to unexplained rise in saponin concentration in the plant. A clinical syndrome of progressive weight loss and death, without photosensitization, has been reported in cattle poisoned by B. decumbens. Main preventive measures are based on the selection of resistant or resilient animals and on the development of Brachiaria species or varieties with low saponin concentration.
format Artigo
author RIVERO, Beatriz Riet Correa
author2 CASTRO, Márcio Botelho de
LEMOS, Ricardo Antônio Amaral de
CORREA, Gabriela Riet
MUSTAFA, Vanessa da Silva
CORREA, Franklin Riet
author2Str CASTRO, Márcio Botelho de
LEMOS, Ricardo Antônio Amaral de
CORREA, Gabriela Riet
MUSTAFA, Vanessa da Silva
CORREA, Franklin Riet
title Brachiaria spp. poisoning of ruminants in Brazil
title_short Brachiaria spp. poisoning of ruminants in Brazil
title_full Brachiaria spp. poisoning of ruminants in Brazil
title_fullStr Brachiaria spp. poisoning of ruminants in Brazil
title_full_unstemmed Brachiaria spp. poisoning of ruminants in Brazil
title_sort brachiaria spp. poisoning of ruminants in brazil
publishDate 2013
url http://repositorio.ufpa.br/jspui/handle/2011/3889
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score 11.755432