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Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos; Embrapa Gado de Leite. |
Data corrente: |
16/08/2021 |
Data da última atualização: |
25/08/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
DIAMANTINO, G. M. L.; PIEREZAN, F.; FERREIRA, M. I. C.; ROCHA, W. S. D. da; OLIVEIRA, V. M. de; MARTINS, C. E.; VEIGA, M. O.; SOTO-BLANCO, B. |
Afiliação: |
GABRIELLA M. L. DIAMANTINO, Universidade Federal de Minas Gerais; FELIPE PIEREZAN, Universidade Federal de Minas Gerais; MARIA IZABEL CARNEIRO FERREIRA, CNPC; WADSON SEBASTIAO DUARTE DA ROCHA, CNPGL; VANIA MARIA DE OLIVEIRA, CNPGL; CARLOS EUGENIO MARTINS, CNPGL; MAÍRA O. VEIGA, Universidade Federal de Lavras; BENITO SOTO-BLANCO, Universidade Federal de Minas Gerais. |
Título: |
Photosensitization by Brachiaria ruziziensis in a sheep herd. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Toxicon, v. 185, p. 1-4, 2020. |
DOI: |
https://doi.org/10.1016/j.toxicon.2020.06.022 |
Idioma: |
Inglês |
Conteúdo: |
Some species of the genus Brachiaria are cultivated worldwide in tropical and subtropical climate regions as the main feed for ruminants. Several studies report photosensitization by Brachiaria decumbens, Brachiaria brizantha, and Brachiaria humidicola, but the poisoning by Brachiaria ruziziensis have been reported only twice. Cutaneous and hepatic lesions may be caused by the steroidal saponins present in the leaves or by the mycotoxin sporidesmin produced by the saprophyte fungus Pithomyces chartarum. The present report describes the clinical and pathological changes observed in an outbreak of hepatogenic photosensitization in sheep kept in B. ruziziensis pastures. In addition, the present study will provide a better understanding of the etiology of this photosensitization through the evaluation of the saponin protodioscin and the spore count of P. chartarum. Santa In^es and Lacaune mixed-breed sheep showed signs of photosensitization after feeding B. ruziziensis. Clinical signs included jaundice, apathy, dehydration, and photosensitization characterized by facial edema and cutaneous scars, especially in the ears. Pathological examination of the liver revealed diffuse infiltrates of foamy cells, rare
multinucleated cells, and mild enlargement of hepatocytes (megalocytosis). The skin showed acute epidermal and dermal necrosis with occlusive thrombi. B. ruziziensis showed low levels of protodioscin (0.020 +- 0.024% in mature leaves and 0.065 +- 0.084% in sprouts) but high P. chartarum spore counts (mean of 479,844 +- 443,951 spores/g plant). Thus, sheep grazing B. ruziziensis pastures must be closely monitored because of the risk of photosensitization. MenosSome species of the genus Brachiaria are cultivated worldwide in tropical and subtropical climate regions as the main feed for ruminants. Several studies report photosensitization by Brachiaria decumbens, Brachiaria brizantha, and Brachiaria humidicola, but the poisoning by Brachiaria ruziziensis have been reported only twice. Cutaneous and hepatic lesions may be caused by the steroidal saponins present in the leaves or by the mycotoxin sporidesmin produced by the saprophyte fungus Pithomyces chartarum. The present report describes the clinical and pathological changes observed in an outbreak of hepatogenic photosensitization in sheep kept in B. ruziziensis pastures. In addition, the present study will provide a better understanding of the etiology of this photosensitization through the evaluation of the saponin protodioscin and the spore count of P. chartarum. Santa In^es and Lacaune mixed-breed sheep showed signs of photosensitization after feeding B. ruziziensis. Clinical signs included jaundice, apathy, dehydration, and photosensitization characterized by facial edema and cutaneous scars, especially in the ears. Pathological examination of the liver revealed diffuse infiltrates of foamy cells, rare
multinucleated cells, and mild enlargement of hepatocytes (megalocytosis). The skin showed acute epidermal and dermal necrosis with occlusive thrombi. B. ruziziensis showed low levels of protodioscin (0.020 +- 0.024% in mature leaves and 0.065 +- 0.084% in sprouts) but high P.... Mostrar Tudo |
Thesagro: |
Fotossensibilização; Ovelha; Ovino; Pastagem; Saponina. |
Thesaurus Nal: |
Pithomyces; Plant poisoning. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02510naa a2200301 a 4500 001 2133838 005 2021-08-25 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.toxicon.2020.06.022$2DOI 100 1 $aDIAMANTINO, G. M. L. 245 $aPhotosensitization by Brachiaria ruziziensis in a sheep herd.$h[electronic resource] 260 $c2020 520 $aSome species of the genus Brachiaria are cultivated worldwide in tropical and subtropical climate regions as the main feed for ruminants. Several studies report photosensitization by Brachiaria decumbens, Brachiaria brizantha, and Brachiaria humidicola, but the poisoning by Brachiaria ruziziensis have been reported only twice. Cutaneous and hepatic lesions may be caused by the steroidal saponins present in the leaves or by the mycotoxin sporidesmin produced by the saprophyte fungus Pithomyces chartarum. The present report describes the clinical and pathological changes observed in an outbreak of hepatogenic photosensitization in sheep kept in B. ruziziensis pastures. In addition, the present study will provide a better understanding of the etiology of this photosensitization through the evaluation of the saponin protodioscin and the spore count of P. chartarum. Santa In^es and Lacaune mixed-breed sheep showed signs of photosensitization after feeding B. ruziziensis. Clinical signs included jaundice, apathy, dehydration, and photosensitization characterized by facial edema and cutaneous scars, especially in the ears. Pathological examination of the liver revealed diffuse infiltrates of foamy cells, rare multinucleated cells, and mild enlargement of hepatocytes (megalocytosis). The skin showed acute epidermal and dermal necrosis with occlusive thrombi. B. ruziziensis showed low levels of protodioscin (0.020 +- 0.024% in mature leaves and 0.065 +- 0.084% in sprouts) but high P. chartarum spore counts (mean of 479,844 +- 443,951 spores/g plant). Thus, sheep grazing B. ruziziensis pastures must be closely monitored because of the risk of photosensitization. 650 $aPithomyces 650 $aPlant poisoning 650 $aFotossensibilização 650 $aOvelha 650 $aOvino 650 $aPastagem 650 $aSaponina 700 1 $aPIEREZAN, F. 700 1 $aFERREIRA, M. I. C. 700 1 $aROCHA, W. S. D. da 700 1 $aOLIVEIRA, V. M. de 700 1 $aMARTINS, C. E. 700 1 $aVEIGA, M. O. 700 1 $aSOTO-BLANCO, B. 773 $tToxicon$gv. 185, p. 1-4, 2020.
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Embrapa Caprinos e Ovinos (CNPC) |
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Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
21/12/2018 |
Data da última atualização: |
21/12/2018 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
MONTAGNER, D. B.; EUCLIDES, V. P. B.; SOUSA, C. C. C.; ARAUJO, A. R. de; BARBOSA, L. F.; SOUZA, D. L. de. |
Afiliação: |
DENISE BAPTAGLIN MONTAGNER, CNPGC; VALERIA PACHECO BATISTA EUCLIDES, CNPGC; Caryze Cristine Cardoso Sousa, Programa de Pós-Graduação em Zootecnia/Universidade Federal da Grande Dourados - UFGD; ALEXANDRE ROMEIRO DE ARAUJO, CNPGC; Leandro Francisco Barbosa, Programa de Pós-Graduação em Zootecnia/Universidade Federal da Grande Dourados - UFGD; Daniele Lopes de Souza, Bolsista PIBIC/CNPq/EMBRAPA. |
Título: |
Nitorgen doses affecting Mombaça grass morphogenetic characteristic under grazing. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 55.; CONGRESSO BRASILEIRO DE ZOOTECNIA, 28., 2018, Goiânia. Construindo saberes, formando pessoas e transformando a produção animal: anais. Viçosa: Sociedade Brasileira de Zootecnia; Brasília, DF: Associação Brasileira de Zootecnistas. |
Idioma: |
Inglês |
Conteúdo: |
The Panicum maximum cv. Mombaça is the most productive tropical grass. For this reason, it is used on intensive production systems submitted to high stocking rate and inputs uses, like nitrogen, irrigation, etc. The nitrogen use implies increases on biomass production due to its effects on morphogenetic plants characteristics. The objective of this work was evaluating morphogenetic and structural responses of mombaça grass receiving 100, 200 or 300 kg ha-1 of nitrogen in form of urea. It was used the randomized block design, with three treatments and four replicates (six paddocks of 0.25 ha each treatment), totaling 4.5 ha. |
Palavras-Chave: |
Leaf appearance; Leaf elongation; Tiller population. |
Thesaurus NAL: |
Stem elongation; Tropical grasslands. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/189231/1/Nitrogen-doses-affecting-Mombaca.pdf
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Marc: |
LEADER 01579nam a2200229 a 4500 001 2102396 005 2018-12-21 008 2018 bl uuuu u00u1 u #d 100 1 $aMONTAGNER, D. B. 245 $aNitorgen doses affecting Mombaça grass morphogenetic characteristic under grazing.$h[electronic resource] 260 $aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 55.; CONGRESSO BRASILEIRO DE ZOOTECNIA, 28., 2018, Goiânia. Construindo saberes, formando pessoas e transformando a produção animal: anais. Viçosa: Sociedade Brasileira de Zootecnia; Brasília, DF: Associação Brasileira de Zootecnistas.$c2018 520 $aThe Panicum maximum cv. Mombaça is the most productive tropical grass. For this reason, it is used on intensive production systems submitted to high stocking rate and inputs uses, like nitrogen, irrigation, etc. The nitrogen use implies increases on biomass production due to its effects on morphogenetic plants characteristics. The objective of this work was evaluating morphogenetic and structural responses of mombaça grass receiving 100, 200 or 300 kg ha-1 of nitrogen in form of urea. It was used the randomized block design, with three treatments and four replicates (six paddocks of 0.25 ha each treatment), totaling 4.5 ha. 650 $aStem elongation 650 $aTropical grasslands 653 $aLeaf appearance 653 $aLeaf elongation 653 $aTiller population 700 1 $aEUCLIDES, V. P. B. 700 1 $aSOUSA, C. C. C. 700 1 $aARAUJO, A. R. de 700 1 $aBARBOSA, L. F. 700 1 $aSOUZA, D. L. de
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