Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de Janeiro
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Pesquisa Veterinária Brasileira (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-736X2021000100248 |
Resumo: | ABSTRACT: Colic outbreaks in horses have been associated with the grazing of several Megathyrsus maximus (Sin. Panicum maximum) cultivars in the North and Central-West regions of Brazil. In this paper, we report a horse colic outbreak in the Southeast region of Brazil caused by ingestion of the “Colonião” cultivar of M. maximus, which has not previously been considered as toxic. The five affected horses belonged to the Veterinary Platoon based at the Central Ammunition Deposit of the Brazilian Army in the city of Paracambi, Rio de Janeiro state, Brazil. The horses had access to treated water and commercial concentrate, and were located in a field of M. maximus at the time of the outbreak. All horses exhibited clinical signs of colic and bloat, and three of them died. The extend of the clinical course ranged from four to five days in the three animals that died; in the two animals that recovered from the colic episodes, the extend of the clinical courses were 10 and 15 days. Necropsy findings revealed intestinal and gastric bloating and hemorrhages involving the intestinal wall. Light microscopy showed moderate diffuse lymphoplasmacytic and eosinophilic enteritis with multifocal erosions, in addition to submucosal edema associated with multifocal vasculitis. The pathogenesis of colic caused by M. maximus ingestion in horses has not yet been elucidated. Some authors have suggested that higher starch concentrations in M. maximus during the rainy season may be responsible for the toxicity of this plant. However, the findings of this study do not support this hypothesis. As a prophylactic measure, it is suggested that horses do not graze exclusively M. maximus at the beginning of rainy periods, in which regrowth of this grass occurs. In Brazil, outbreaks of horse colic associated with ingestion of varieties of Megathyrsus can also occur outside the North and Midwest regions, under specific climate conditions. |
id |
EMBRAPA-2_772a958d79e114cde3ff36dbbaab234a |
---|---|
oai_identifier_str |
oai:scielo:S0100-736X2021000100248 |
network_acronym_str |
EMBRAPA-2 |
network_name_str |
Pesquisa Veterinária Brasileira (Online) |
repository_id_str |
|
spelling |
Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de JaneiroPoisonous plantscolicPanicum maximumMegathyrsus maximuscv. ColoniãohorsesBrazilABSTRACT: Colic outbreaks in horses have been associated with the grazing of several Megathyrsus maximus (Sin. Panicum maximum) cultivars in the North and Central-West regions of Brazil. In this paper, we report a horse colic outbreak in the Southeast region of Brazil caused by ingestion of the “Colonião” cultivar of M. maximus, which has not previously been considered as toxic. The five affected horses belonged to the Veterinary Platoon based at the Central Ammunition Deposit of the Brazilian Army in the city of Paracambi, Rio de Janeiro state, Brazil. The horses had access to treated water and commercial concentrate, and were located in a field of M. maximus at the time of the outbreak. All horses exhibited clinical signs of colic and bloat, and three of them died. The extend of the clinical course ranged from four to five days in the three animals that died; in the two animals that recovered from the colic episodes, the extend of the clinical courses were 10 and 15 days. Necropsy findings revealed intestinal and gastric bloating and hemorrhages involving the intestinal wall. Light microscopy showed moderate diffuse lymphoplasmacytic and eosinophilic enteritis with multifocal erosions, in addition to submucosal edema associated with multifocal vasculitis. The pathogenesis of colic caused by M. maximus ingestion in horses has not yet been elucidated. Some authors have suggested that higher starch concentrations in M. maximus during the rainy season may be responsible for the toxicity of this plant. However, the findings of this study do not support this hypothesis. As a prophylactic measure, it is suggested that horses do not graze exclusively M. maximus at the beginning of rainy periods, in which regrowth of this grass occurs. In Brazil, outbreaks of horse colic associated with ingestion of varieties of Megathyrsus can also occur outside the North and Midwest regions, under specific climate conditions.Colégio Brasileiro de Patologia Animal - CBPA2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-736X2021000100248Pesquisa Veterinária Brasileira v.41 2021reponame:Pesquisa Veterinária Brasileira (Online)instname:Colégio Brasileiro de Patologia Animal (CBPA)instacron:EMBRAPA10.1590/1678-5150-pvb-6848info:eu-repo/semantics/openAccessFrança,Ticiana N.Carletti,Stephni M.Rocha,Juliana F.Santos,Bartolomeu B.N.Oliveira,Mariana C.Ubiali,Daniel G.Malafaia,PedroPeixoto,Paulo Vargaseng2021-12-06T00:00:00Zoai:scielo:S0100-736X2021000100248Revistahttp://www.pvb.com.br/https://old.scielo.br/oai/scielo-oai.phpcolegio@cbpa.org.br||pvb@pvb.com.br0100-736X1678-5150opendoar:2021-12-06T00:00Pesquisa Veterinária Brasileira (Online) - Colégio Brasileiro de Patologia Animal (CBPA)false |
dc.title.none.fl_str_mv |
Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de Janeiro |
title |
Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de Janeiro |
spellingShingle |
Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de Janeiro França,Ticiana N. Poisonous plants colic Panicum maximum Megathyrsus maximus cv. Colonião horses Brazil |
title_short |
Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de Janeiro |
title_full |
Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de Janeiro |
title_fullStr |
Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de Janeiro |
title_full_unstemmed |
Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de Janeiro |
title_sort |
Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de Janeiro |
author |
França,Ticiana N. |
author_facet |
França,Ticiana N. Carletti,Stephni M. Rocha,Juliana F. Santos,Bartolomeu B.N. Oliveira,Mariana C. Ubiali,Daniel G. Malafaia,Pedro Peixoto,Paulo Vargas |
author_role |
author |
author2 |
Carletti,Stephni M. Rocha,Juliana F. Santos,Bartolomeu B.N. Oliveira,Mariana C. Ubiali,Daniel G. Malafaia,Pedro Peixoto,Paulo Vargas |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
França,Ticiana N. Carletti,Stephni M. Rocha,Juliana F. Santos,Bartolomeu B.N. Oliveira,Mariana C. Ubiali,Daniel G. Malafaia,Pedro Peixoto,Paulo Vargas |
dc.subject.por.fl_str_mv |
Poisonous plants colic Panicum maximum Megathyrsus maximus cv. Colonião horses Brazil |
topic |
Poisonous plants colic Panicum maximum Megathyrsus maximus cv. Colonião horses Brazil |
description |
ABSTRACT: Colic outbreaks in horses have been associated with the grazing of several Megathyrsus maximus (Sin. Panicum maximum) cultivars in the North and Central-West regions of Brazil. In this paper, we report a horse colic outbreak in the Southeast region of Brazil caused by ingestion of the “Colonião” cultivar of M. maximus, which has not previously been considered as toxic. The five affected horses belonged to the Veterinary Platoon based at the Central Ammunition Deposit of the Brazilian Army in the city of Paracambi, Rio de Janeiro state, Brazil. The horses had access to treated water and commercial concentrate, and were located in a field of M. maximus at the time of the outbreak. All horses exhibited clinical signs of colic and bloat, and three of them died. The extend of the clinical course ranged from four to five days in the three animals that died; in the two animals that recovered from the colic episodes, the extend of the clinical courses were 10 and 15 days. Necropsy findings revealed intestinal and gastric bloating and hemorrhages involving the intestinal wall. Light microscopy showed moderate diffuse lymphoplasmacytic and eosinophilic enteritis with multifocal erosions, in addition to submucosal edema associated with multifocal vasculitis. The pathogenesis of colic caused by M. maximus ingestion in horses has not yet been elucidated. Some authors have suggested that higher starch concentrations in M. maximus during the rainy season may be responsible for the toxicity of this plant. However, the findings of this study do not support this hypothesis. As a prophylactic measure, it is suggested that horses do not graze exclusively M. maximus at the beginning of rainy periods, in which regrowth of this grass occurs. In Brazil, outbreaks of horse colic associated with ingestion of varieties of Megathyrsus can also occur outside the North and Midwest regions, under specific climate conditions. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-736X2021000100248 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-736X2021000100248 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1678-5150-pvb-6848 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Colégio Brasileiro de Patologia Animal - CBPA |
publisher.none.fl_str_mv |
Colégio Brasileiro de Patologia Animal - CBPA |
dc.source.none.fl_str_mv |
Pesquisa Veterinária Brasileira v.41 2021 reponame:Pesquisa Veterinária Brasileira (Online) instname:Colégio Brasileiro de Patologia Animal (CBPA) instacron:EMBRAPA |
instname_str |
Colégio Brasileiro de Patologia Animal (CBPA) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Veterinária Brasileira (Online) |
collection |
Pesquisa Veterinária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Veterinária Brasileira (Online) - Colégio Brasileiro de Patologia Animal (CBPA) |
repository.mail.fl_str_mv |
colegio@cbpa.org.br||pvb@pvb.com.br |
_version_ |
1754122240918552576 |