Histopathological changes induced by Caligus rogercresseyi in rainbow trout (Oncorhynchus mykiss)

ABSTRACT The purpose of this study was to characterize histopathological changes induced by the sea louse Caligus rogercresseyi in juvenile individuals of rainbow trout (Oncorhynchus mykiss). Specific effects were determined for mucus-secreting cells, mast cells/eosinophilic granule cells (MCs/EGCs)...

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Autores principales:	Rojas,Verónica, Sánchez,Delany, Gallardo,José A., Mercado,Luis
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2018
Materias:	Caligus rogercresseyi rainbow trout inflammatory response caspase-1 sea lice
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000400843
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spelling	oai:scielo:S0718-560X20180004008432018-11-06Histopathological changes induced by Caligus rogercresseyi in rainbow trout (Oncorhynchus mykiss)Rojas,VerónicaSánchez,DelanyGallardo,José A.Mercado,Luis Caligus rogercresseyi rainbow trout inflammatory response caspase-1 sea lice ABSTRACT The purpose of this study was to characterize histopathological changes induced by the sea louse Caligus rogercresseyi in juvenile individuals of rainbow trout (Oncorhynchus mykiss). Specific effects were determined for mucus-secreting cells, mast cells/eosinophilic granule cells (MCs/EGCs) and activation of pro-inflammatory caspase-1, which are involved in the inflammatory response. As expected, C. rogercresseyi eroded the skin to varying degrees, with increased mucus-secreting cells in the epidermis and melanophores in the dermis. Gill responses included epithelial hyperplasia, secondary lamellae fusion, an increased quantity of mucus-secreting cells in the epithelium, and MCs/EGCs in the connective tissue. Other histological changes included abundant MCs/EGCs and secretory cells in the intestine, as well as numerous melano-macrophage centres in head kidney stroma cells. Finally, the observed inflammatory response was associated with active caspase-1 detection in the gills, but not in the other assessed organs. In conclusion, C. rogercresseyi induced significant histopathological alterations in O. mykiss skin and gills and minor histological changes in the intestine and head kidney, which may reflect the overall inflammatory response of rainbow trout to infestation with sea lice.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.46 n.4 20182018-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000400843en10.3856/vol46-issue4-fulltext-23
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Caligus rogercresseyi rainbow trout inflammatory response caspase-1 sea lice
spellingShingle	Caligus rogercresseyi rainbow trout inflammatory response caspase-1 sea lice Rojas,Verónica Sánchez,Delany Gallardo,José A. Mercado,Luis Histopathological changes induced by Caligus rogercresseyi in rainbow trout (Oncorhynchus mykiss)
description	ABSTRACT The purpose of this study was to characterize histopathological changes induced by the sea louse Caligus rogercresseyi in juvenile individuals of rainbow trout (Oncorhynchus mykiss). Specific effects were determined for mucus-secreting cells, mast cells/eosinophilic granule cells (MCs/EGCs) and activation of pro-inflammatory caspase-1, which are involved in the inflammatory response. As expected, C. rogercresseyi eroded the skin to varying degrees, with increased mucus-secreting cells in the epidermis and melanophores in the dermis. Gill responses included epithelial hyperplasia, secondary lamellae fusion, an increased quantity of mucus-secreting cells in the epithelium, and MCs/EGCs in the connective tissue. Other histological changes included abundant MCs/EGCs and secretory cells in the intestine, as well as numerous melano-macrophage centres in head kidney stroma cells. Finally, the observed inflammatory response was associated with active caspase-1 detection in the gills, but not in the other assessed organs. In conclusion, C. rogercresseyi induced significant histopathological alterations in O. mykiss skin and gills and minor histological changes in the intestine and head kidney, which may reflect the overall inflammatory response of rainbow trout to infestation with sea lice.
author	Rojas,Verónica Sánchez,Delany Gallardo,José A. Mercado,Luis
author_facet	Rojas,Verónica Sánchez,Delany Gallardo,José A. Mercado,Luis
author_sort	Rojas,Verónica
title	Histopathological changes induced by Caligus rogercresseyi in rainbow trout (Oncorhynchus mykiss)
title_short	Histopathological changes induced by Caligus rogercresseyi in rainbow trout (Oncorhynchus mykiss)
title_full	Histopathological changes induced by Caligus rogercresseyi in rainbow trout (Oncorhynchus mykiss)
title_fullStr	Histopathological changes induced by Caligus rogercresseyi in rainbow trout (Oncorhynchus mykiss)
title_full_unstemmed	Histopathological changes induced by Caligus rogercresseyi in rainbow trout (Oncorhynchus mykiss)
title_sort	histopathological changes induced by caligus rogercresseyi in rainbow trout (oncorhynchus mykiss)
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000400843
work_keys_str_mv	AT rojasveronica histopathologicalchangesinducedbycaligusrogercresseyiinrainbowtroutoncorhynchusmykiss AT sanchezdelany histopathologicalchangesinducedbycaligusrogercresseyiinrainbowtroutoncorhynchusmykiss AT gallardojosea histopathologicalchangesinducedbycaligusrogercresseyiinrainbowtroutoncorhynchusmykiss AT mercadoluis histopathologicalchangesinducedbycaligusrogercresseyiinrainbowtroutoncorhynchusmykiss
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Histopathological changes induced by Caligus rogercresseyi in rainbow trout (Oncorhynchus mykiss)

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