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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha : |
02/03/2017 |
Actualizado : |
07/03/2017 |
Autor : |
GARCIA, J.P; GIANNITTI, F.; FINNIE, J.W.; MANAVIS, J. .; BEINGESSER, J.; ADAMS ,V.; ROOD, J.I.; UZAL, F.A. |
Afiliación : |
FEDERICO GIANNITTI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Comparative Neuropathology of Ovine Enterotoxemia Produced by Clostridium perfringens Type D Wild-Type Strain CN1020 and Its Genetically Modified Derivatives. |
Fecha de publicación : |
2015 |
Fuente / Imprenta : |
Veterinary Pathology, 2015, v.52.n.6. p.1250-1253, 2015. |
Idioma : |
Inglés |
Contenido : |
Abstract
Clostridium perfringens type D causes enterotoxemia in sheep and goats. The disease is mediated by epsilon toxin (ETX), which affects the cerebrovascular endothelium, increasing vascular permeability and leading to cerebral edema. In the present study, we compared the distribution and severity of the cerebrovascular changes induced in lambs by C. perfringens type D strain CN1020, its isogenic etx null mutant, and the ETX-producing complemented mutant. We also applied histochemical and immunohistochemical markers to further characterize the brain lesions induced by ETX. Both ETX-producing strains induced extensive cerebrovascular damage that did not differ significantly between each other in nature, neuroanatomic distribution, or severity. By contrast, lambs inoculated with the etx mutant or sterile, nontoxic culture medium did not develop detectable brain lesions, confirming that the neuropathologic effects observed in these infections are dependent on ETX production. Lambs treated with the wild-type and complemented strains showed perivascular and mural vascular edema, as well as serum albumin extravasation, particularly severe in the cerebral white matter, midbrain, medulla oblongata, and cerebellum. Brains of animals inoculated with the ETX-producing strains showed decreased expression of glial fibrillary acidic protein and increased expression of aquaporin-4 in the end-feet processes of the astrocytes around blood vessels. Early axonal injury was demonstrated with anti?amyloid precursor protein immunohistochemistry. Perivascular accumulation of macrophages/microglia with intracytoplasmic albumin globules was also observed in these animals. This study demonstrates that ETX is responsible for the major cerebrovascular changes in C. perfringens type D?induced disease. MenosAbstract
Clostridium perfringens type D causes enterotoxemia in sheep and goats. The disease is mediated by epsilon toxin (ETX), which affects the cerebrovascular endothelium, increasing vascular permeability and leading to cerebral edema. In the present study, we compared the distribution and severity of the cerebrovascular changes induced in lambs by C. perfringens type D strain CN1020, its isogenic etx null mutant, and the ETX-producing complemented mutant. We also applied histochemical and immunohistochemical markers to further characterize the brain lesions induced by ETX. Both ETX-producing strains induced extensive cerebrovascular damage that did not differ significantly between each other in nature, neuroanatomic distribution, or severity. By contrast, lambs inoculated with the etx mutant or sterile, nontoxic culture medium did not develop detectable brain lesions, confirming that the neuropathologic effects observed in these infections are dependent on ETX production. Lambs treated with the wild-type and complemented strains showed perivascular and mural vascular edema, as well as serum albumin extravasation, particularly severe in the cerebral white matter, midbrain, medulla oblongata, and cerebellum. Brains of animals inoculated with the ETX-producing strains showed decreased expression of glial fibrillary acidic protein and increased expression of aquaporin-4 in the end-feet processes of the astrocytes around blood vessels. Early axonal injury was demonstrated wi... Presentar Todo |
Thesagro : |
ENFERMEDADES DE LOS ANIMALES. |
Asunto categoría : |
-- |
Marc : |
LEADER 02512naa a2200217 a 4500 001 1056750 005 2017-03-07 008 2015 bl uuuu u00u1 u #d 100 1 $aGARCIA, J.P 245 $aComparative Neuropathology of Ovine Enterotoxemia Produced by Clostridium perfringens Type D Wild-Type Strain CN1020 and Its Genetically Modified Derivatives.$h[electronic resource] 260 $c2015 520 $aAbstract Clostridium perfringens type D causes enterotoxemia in sheep and goats. The disease is mediated by epsilon toxin (ETX), which affects the cerebrovascular endothelium, increasing vascular permeability and leading to cerebral edema. In the present study, we compared the distribution and severity of the cerebrovascular changes induced in lambs by C. perfringens type D strain CN1020, its isogenic etx null mutant, and the ETX-producing complemented mutant. We also applied histochemical and immunohistochemical markers to further characterize the brain lesions induced by ETX. Both ETX-producing strains induced extensive cerebrovascular damage that did not differ significantly between each other in nature, neuroanatomic distribution, or severity. By contrast, lambs inoculated with the etx mutant or sterile, nontoxic culture medium did not develop detectable brain lesions, confirming that the neuropathologic effects observed in these infections are dependent on ETX production. Lambs treated with the wild-type and complemented strains showed perivascular and mural vascular edema, as well as serum albumin extravasation, particularly severe in the cerebral white matter, midbrain, medulla oblongata, and cerebellum. Brains of animals inoculated with the ETX-producing strains showed decreased expression of glial fibrillary acidic protein and increased expression of aquaporin-4 in the end-feet processes of the astrocytes around blood vessels. Early axonal injury was demonstrated with anti?amyloid precursor protein immunohistochemistry. Perivascular accumulation of macrophages/microglia with intracytoplasmic albumin globules was also observed in these animals. This study demonstrates that ETX is responsible for the major cerebrovascular changes in C. perfringens type D?induced disease. 650 $aENFERMEDADES DE LOS ANIMALES 700 1 $aGIANNITTI, F. 700 1 $aFINNIE, J.W. 700 1 $aMANAVIS, J. . 700 1 $aBEINGESSER, J. 700 1 $aADAMS ,V. 700 1 $aROOD, J.I. 700 1 $aUZAL, F.A. 773 $tVeterinary Pathology, 2015$gv.52.n.6. p.1250-1253, 2015.
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INIA La Estanzuela (LE) |
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Biblioteca (s) : |
INIA La Estanzuela; INIA Las Brujas; INIA Tacuarembó; INIA Treinta y Tres. |
Fecha actual : |
21/02/2014 |
Actualizado : |
06/11/2018 |
Tipo de producción científica : |
Libros |
Autor : |
GRUPO DE DESARROLLO DE RIEGO; SEMINARIO INTERNACIONAL, 2., 2012, SALTO, URUGUAY |
Título : |
Riego en cultivos y pasturas. (2do. Seminario Internacional 2012) |
Fecha de publicación : |
2012 |
Fuente / Imprenta : |
Montevideo (Uruguay): INIA, 2012. |
Páginas : |
119 p. |
ISBN : |
978-9974-38-356-2 |
Idioma : |
Español |
Notas : |
Instituciones organizadoras: Grupo de Desarrollo del Riego, Instituto Nacional de Investigación Agropecuaria (INIA), Facultad de Agronomía, PROCISUR. |
Palabras claves : |
ANÁLISIS DE COSTOS; DISEÑO DE CONSTRUCCIONES; FUENTES DE AGUA; PASTURAS. |
Thesagro : |
CAMBIO CLIMÁTICO; CULTIVOS; FORRAJES; FUENTES DE AGUA; INIA; INVESTIGACION; PASTURAS; RECURSOS HIDRICOS; RIEGO; RIEGO EXTENSIVO. |
Asunto categoría : |
F06 Riego |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/1807/1/18429080413094411.pdf
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Marc : |
LEADER 01004nam a2200313 a 4500 001 1009801 005 2018-11-06 008 2012 bl uuuu u01u1 u #d 020 $a978-9974-38-356-2 100 1 $aGRUPO DE DESARROLLO DE RIEGO 245 $aRiego en cultivos y pasturas. (2do. Seminario Internacional 2012) 260 $aMontevideo (Uruguay): INIA$c2012 300 $a119 p. 500 $aInstituciones organizadoras: Grupo de Desarrollo del Riego, Instituto Nacional de Investigación Agropecuaria (INIA), Facultad de Agronomía, PROCISUR. 650 $aCAMBIO CLIMÁTICO 650 $aCULTIVOS 650 $aFORRAJES 650 $aFUENTES DE AGUA 650 $aINIA 650 $aINVESTIGACION 650 $aPASTURAS 650 $aRECURSOS HIDRICOS 650 $aRIEGO 650 $aRIEGO EXTENSIVO 653 $aANÁLISIS DE COSTOS 653 $aDISEÑO DE CONSTRUCCIONES 653 $aFUENTES DE AGUA 653 $aPASTURAS 700 1 $aSEMINARIO INTERNACIONAL, 2., 2012, SALTO, URUGUAY
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