Gross pathology and its relationship with histopathology of amoebic gill disease (AGD) in farmed Atlantic salmon, Salmo salar L.
Abstract Gross pathological assessment of amoebic gill disease (AGD) is the only non‐destructive, financially viable method for rapid and broad‐scale disease management of farmed Atlantic salmon, Salmo salar L., in Tasmania. However, given the presumptive nature of this diagnosis, the technique has...
Published in: | Journal of Fish Diseases |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2004
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1365-2761.2004.00526.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2761.2004.00526.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2761.2004.00526.x |
id |
crwiley:10.1111/j.1365-2761.2004.00526.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1365-2761.2004.00526.x 2024-09-15T17:55:59+00:00 Gross pathology and its relationship with histopathology of amoebic gill disease (AGD) in farmed Atlantic salmon, Salmo salar L. Adams, M B Ellard, K Nowak, B F 2004 http://dx.doi.org/10.1111/j.1365-2761.2004.00526.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2761.2004.00526.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2761.2004.00526.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Diseases volume 27, issue 3, page 151-161 ISSN 0140-7775 1365-2761 journal-article 2004 crwiley https://doi.org/10.1111/j.1365-2761.2004.00526.x 2024-08-01T04:19:56Z Abstract Gross pathological assessment of amoebic gill disease (AGD) is the only non‐destructive, financially viable method for rapid and broad‐scale disease management of farmed Atlantic salmon, Salmo salar L., in Tasmania. However, given the presumptive nature of this diagnosis, the technique has been considered questionable. This study investigated the degree of conformity between clinical signs and histological lesions observed in a commercial setting. Three groups of Atlantic salmon ( n = 42, 100 and 100, respectively) were collected from various farm sites in southern Tasmania between December 2001 and April 2003. Micro‐stereoscopic analysis showed that grossly affected tissue regions correspond to areas of hyperplastic lamellar fusion, generally in association with attached Neoparamoeba sp. Agreement between gross signs of AGD and histopathological diagnosis was compared. Kappa analysis indicated moderate to good agreement between methods ( κ = 0.52–0.74). Individual cases of disagreement were further scrutinized and several factors were found to influence the level of agreement between the two methods. Stage of disease development, lesions derived from other pathogens, assessor interpretation/experience, sampling methods, histological technique and/or experience were potential confounding factors. It was concluded that clinical diagnosis is acceptable as a farm‐monitoring tool only. Removal of grossly affected tissue and subsequent histological examination is recommended to improve diagnostic accuracy. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Diseases 27 3 151 161 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Gross pathological assessment of amoebic gill disease (AGD) is the only non‐destructive, financially viable method for rapid and broad‐scale disease management of farmed Atlantic salmon, Salmo salar L., in Tasmania. However, given the presumptive nature of this diagnosis, the technique has been considered questionable. This study investigated the degree of conformity between clinical signs and histological lesions observed in a commercial setting. Three groups of Atlantic salmon ( n = 42, 100 and 100, respectively) were collected from various farm sites in southern Tasmania between December 2001 and April 2003. Micro‐stereoscopic analysis showed that grossly affected tissue regions correspond to areas of hyperplastic lamellar fusion, generally in association with attached Neoparamoeba sp. Agreement between gross signs of AGD and histopathological diagnosis was compared. Kappa analysis indicated moderate to good agreement between methods ( κ = 0.52–0.74). Individual cases of disagreement were further scrutinized and several factors were found to influence the level of agreement between the two methods. Stage of disease development, lesions derived from other pathogens, assessor interpretation/experience, sampling methods, histological technique and/or experience were potential confounding factors. It was concluded that clinical diagnosis is acceptable as a farm‐monitoring tool only. Removal of grossly affected tissue and subsequent histological examination is recommended to improve diagnostic accuracy. |
format |
Article in Journal/Newspaper |
author |
Adams, M B Ellard, K Nowak, B F |
spellingShingle |
Adams, M B Ellard, K Nowak, B F Gross pathology and its relationship with histopathology of amoebic gill disease (AGD) in farmed Atlantic salmon, Salmo salar L. |
author_facet |
Adams, M B Ellard, K Nowak, B F |
author_sort |
Adams, M B |
title |
Gross pathology and its relationship with histopathology of amoebic gill disease (AGD) in farmed Atlantic salmon, Salmo salar L. |
title_short |
Gross pathology and its relationship with histopathology of amoebic gill disease (AGD) in farmed Atlantic salmon, Salmo salar L. |
title_full |
Gross pathology and its relationship with histopathology of amoebic gill disease (AGD) in farmed Atlantic salmon, Salmo salar L. |
title_fullStr |
Gross pathology and its relationship with histopathology of amoebic gill disease (AGD) in farmed Atlantic salmon, Salmo salar L. |
title_full_unstemmed |
Gross pathology and its relationship with histopathology of amoebic gill disease (AGD) in farmed Atlantic salmon, Salmo salar L. |
title_sort |
gross pathology and its relationship with histopathology of amoebic gill disease (agd) in farmed atlantic salmon, salmo salar l. |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1111/j.1365-2761.2004.00526.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2761.2004.00526.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2761.2004.00526.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Diseases volume 27, issue 3, page 151-161 ISSN 0140-7775 1365-2761 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2761.2004.00526.x |
container_title |
Journal of Fish Diseases |
container_volume |
27 |
container_issue |
3 |
container_start_page |
151 |
op_container_end_page |
161 |
_version_ |
1810432195351805952 |