Lawsonia intracellularis in pigs: progression of lesions and Involvement of apoptosis
- Autores
- Guedes, Roberto M. C.; Machuca, Mariana Alejandra; Quiroga, María Alejandra; Real Pereira, Carlos E.; Resende, Talita P.; Gebhart, Connie J.
- Año de publicación
- 2017
- Idioma
- español castellano
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The purpose of this study was to follow the progression of gross and histologic lesions and apoptosis events in Lawsonia intracellularis- infected enterocytes through the course of the disease, proliferative enteropathy (PE). Thirty 5-week-old pigs were divided into 2 groups: 20 challenged and 10 control animals. Groups of 3 pigs, 2 challenged and 1 control, were euthanized at 1, 3, 5, 8, 11, 15, 19, 24, 29, and 35 days after inoculation. Complete necropsies were performed with gross evaluation. Tissue samples from different sites of the gastrointestinal tract and other visceral organs were collected for routine histologic staining and for immunohistochemistry (IHC) for L. intracellularis. In addition, caspase-3, terminal deoxyuridine nick-end labeling assay, and electron microscopy were performed in ileum samples. Macroscopic and histologic lesions suggestive of PE were first detected 11 days after infection and continued through day 24. L. intracellularis antigen was first detected in the intestine by IHC on day 5 after inoculation, and the bacterium was first detected by transmission electron microscopy on day 15. Positive IHC staining for [L. intracellularis] and enterocyte proliferation, but no gross lesion, were detected on day 29. All 3 pigs euthanized on day 35 were grossly and histologically normal and IHC negative. Hyperplastic crypts in challenge pigs had more apoptotic cells on days 15, 19, and 24 postinfection (P < .05) compared to control pigs. Our results demonstrated the progression of lesions and infection by L. intracellularis and that inhibition of enterocyte apoptosis is not involved in the pathogenesis of proliferative enteropathy.
Facultad de Ciencias Veterinarias - Materia
-
Ciencias Veterinarias
Apoptosis
Caspase-3
Immunohistochemistry
Lawsonia intracellularis
Pathogenesis
Proliferative enteropathy
Swine
TUNEL - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/104798
Ver los metadatos del registro completo
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Lawsonia intracellularis in pigs: progression of lesions and Involvement of apoptosisGuedes, Roberto M. C.Machuca, Mariana AlejandraQuiroga, María AlejandraReal Pereira, Carlos E.Resende, Talita P.Gebhart, Connie J.Ciencias VeterinariasApoptosisCaspase-3ImmunohistochemistryLawsonia intracellularisPathogenesisProliferative enteropathySwineTUNELThe purpose of this study was to follow the progression of gross and histologic lesions and apoptosis events in Lawsonia intracellularis- infected enterocytes through the course of the disease, proliferative enteropathy (PE). Thirty 5-week-old pigs were divided into 2 groups: 20 challenged and 10 control animals. Groups of 3 pigs, 2 challenged and 1 control, were euthanized at 1, 3, 5, 8, 11, 15, 19, 24, 29, and 35 days after inoculation. Complete necropsies were performed with gross evaluation. Tissue samples from different sites of the gastrointestinal tract and other visceral organs were collected for routine histologic staining and for immunohistochemistry (IHC) for L. intracellularis. In addition, caspase-3, terminal deoxyuridine nick-end labeling assay, and electron microscopy were performed in ileum samples. Macroscopic and histologic lesions suggestive of PE were first detected 11 days after infection and continued through day 24. L. intracellularis antigen was first detected in the intestine by IHC on day 5 after inoculation, and the bacterium was first detected by transmission electron microscopy on day 15. Positive IHC staining for [L. intracellularis] and enterocyte proliferation, but no gross lesion, were detected on day 29. All 3 pigs euthanized on day 35 were grossly and histologically normal and IHC negative. Hyperplastic crypts in challenge pigs had more apoptotic cells on days 15, 19, and 24 postinfection (P < .05) compared to control pigs. Our results demonstrated the progression of lesions and infection by L. intracellularis and that inhibition of enterocyte apoptosis is not involved in the pathogenesis of proliferative enteropathy.Facultad de Ciencias Veterinarias2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf620-628http://sedici.unlp.edu.ar/handle/10915/104798spainfo:eu-repo/semantics/altIdentifier/issn/1544-2217info:eu-repo/semantics/altIdentifier/doi/10.1177/0300985817698206info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:22:57Zoai:sedici.unlp.edu.ar:10915/104798Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:22:58.003SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Lawsonia intracellularis in pigs: progression of lesions and Involvement of apoptosis |
title |
Lawsonia intracellularis in pigs: progression of lesions and Involvement of apoptosis |
spellingShingle |
Lawsonia intracellularis in pigs: progression of lesions and Involvement of apoptosis Guedes, Roberto M. C. Ciencias Veterinarias Apoptosis Caspase-3 Immunohistochemistry Lawsonia intracellularis Pathogenesis Proliferative enteropathy Swine TUNEL |
title_short |
Lawsonia intracellularis in pigs: progression of lesions and Involvement of apoptosis |
title_full |
Lawsonia intracellularis in pigs: progression of lesions and Involvement of apoptosis |
title_fullStr |
Lawsonia intracellularis in pigs: progression of lesions and Involvement of apoptosis |
title_full_unstemmed |
Lawsonia intracellularis in pigs: progression of lesions and Involvement of apoptosis |
title_sort |
Lawsonia intracellularis in pigs: progression of lesions and Involvement of apoptosis |
dc.creator.none.fl_str_mv |
Guedes, Roberto M. C. Machuca, Mariana Alejandra Quiroga, María Alejandra Real Pereira, Carlos E. Resende, Talita P. Gebhart, Connie J. |
author |
Guedes, Roberto M. C. |
author_facet |
Guedes, Roberto M. C. Machuca, Mariana Alejandra Quiroga, María Alejandra Real Pereira, Carlos E. Resende, Talita P. Gebhart, Connie J. |
author_role |
author |
author2 |
Machuca, Mariana Alejandra Quiroga, María Alejandra Real Pereira, Carlos E. Resende, Talita P. Gebhart, Connie J. |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Veterinarias Apoptosis Caspase-3 Immunohistochemistry Lawsonia intracellularis Pathogenesis Proliferative enteropathy Swine TUNEL |
topic |
Ciencias Veterinarias Apoptosis Caspase-3 Immunohistochemistry Lawsonia intracellularis Pathogenesis Proliferative enteropathy Swine TUNEL |
dc.description.none.fl_txt_mv |
The purpose of this study was to follow the progression of gross and histologic lesions and apoptosis events in Lawsonia intracellularis- infected enterocytes through the course of the disease, proliferative enteropathy (PE). Thirty 5-week-old pigs were divided into 2 groups: 20 challenged and 10 control animals. Groups of 3 pigs, 2 challenged and 1 control, were euthanized at 1, 3, 5, 8, 11, 15, 19, 24, 29, and 35 days after inoculation. Complete necropsies were performed with gross evaluation. Tissue samples from different sites of the gastrointestinal tract and other visceral organs were collected for routine histologic staining and for immunohistochemistry (IHC) for L. intracellularis. In addition, caspase-3, terminal deoxyuridine nick-end labeling assay, and electron microscopy were performed in ileum samples. Macroscopic and histologic lesions suggestive of PE were first detected 11 days after infection and continued through day 24. L. intracellularis antigen was first detected in the intestine by IHC on day 5 after inoculation, and the bacterium was first detected by transmission electron microscopy on day 15. Positive IHC staining for [L. intracellularis] and enterocyte proliferation, but no gross lesion, were detected on day 29. All 3 pigs euthanized on day 35 were grossly and histologically normal and IHC negative. Hyperplastic crypts in challenge pigs had more apoptotic cells on days 15, 19, and 24 postinfection (P < .05) compared to control pigs. Our results demonstrated the progression of lesions and infection by L. intracellularis and that inhibition of enterocyte apoptosis is not involved in the pathogenesis of proliferative enteropathy. Facultad de Ciencias Veterinarias |
description |
The purpose of this study was to follow the progression of gross and histologic lesions and apoptosis events in Lawsonia intracellularis- infected enterocytes through the course of the disease, proliferative enteropathy (PE). Thirty 5-week-old pigs were divided into 2 groups: 20 challenged and 10 control animals. Groups of 3 pigs, 2 challenged and 1 control, were euthanized at 1, 3, 5, 8, 11, 15, 19, 24, 29, and 35 days after inoculation. Complete necropsies were performed with gross evaluation. Tissue samples from different sites of the gastrointestinal tract and other visceral organs were collected for routine histologic staining and for immunohistochemistry (IHC) for L. intracellularis. In addition, caspase-3, terminal deoxyuridine nick-end labeling assay, and electron microscopy were performed in ileum samples. Macroscopic and histologic lesions suggestive of PE were first detected 11 days after infection and continued through day 24. L. intracellularis antigen was first detected in the intestine by IHC on day 5 after inoculation, and the bacterium was first detected by transmission electron microscopy on day 15. Positive IHC staining for [L. intracellularis] and enterocyte proliferation, but no gross lesion, were detected on day 29. All 3 pigs euthanized on day 35 were grossly and histologically normal and IHC negative. Hyperplastic crypts in challenge pigs had more apoptotic cells on days 15, 19, and 24 postinfection (P < .05) compared to control pigs. Our results demonstrated the progression of lesions and infection by L. intracellularis and that inhibition of enterocyte apoptosis is not involved in the pathogenesis of proliferative enteropathy. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
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publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/104798 |
url |
http://sedici.unlp.edu.ar/handle/10915/104798 |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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