Studies on cultured and gill‐attached Paramoeba sp. (Gymnamoebae: Paramoebidae) and the cytopathology of paramoebic gill disease in Atlantic salmon, Salmo salar L., from Tasmania
Abstract. The normally free‐living amoeba Paramoeba sp. is associated with epithelial hyperplasia on the gills of Atlantic salmon, Salmo salar L., in Tasmania. Gill‐attached paramoebae were significantly larger than cultured ones. Unlike cultured paramoebae, gill‐attached ones had small electron‐den...
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Online Access: | http://dx.doi.org/10.1111/j.1365-2761.1989.tb00559.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2761.1989.tb00559.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2761.1989.tb00559.x |
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crwiley:10.1111/j.1365-2761.1989.tb00559.x 2024-06-02T08:03:29+00:00 Studies on cultured and gill‐attached Paramoeba sp. (Gymnamoebae: Paramoebidae) and the cytopathology of paramoebic gill disease in Atlantic salmon, Salmo salar L., from Tasmania ROUBAL, F. R. LESTER, R. J. G. FOSTER, C. K. 1989 http://dx.doi.org/10.1111/j.1365-2761.1989.tb00559.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2761.1989.tb00559.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2761.1989.tb00559.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Diseases volume 12, issue 5, page 481-492 ISSN 0140-7775 1365-2761 journal-article 1989 crwiley https://doi.org/10.1111/j.1365-2761.1989.tb00559.x 2024-05-03T11:28:46Z Abstract. The normally free‐living amoeba Paramoeba sp. is associated with epithelial hyperplasia on the gills of Atlantic salmon, Salmo salar L., in Tasmania. Gill‐attached paramoebae were significantly larger than cultured ones. Unlike cultured paramoebae, gill‐attached ones had small electron‐dense, cytoplasmic deposits and small surface projections at the host‐parasite interface. Examination of sequential samples of Tasmanian salmon gills from spring to summer indicated that pathological changes in the gill filaments were associated only with the presence of Paramoeba the parasite was also associated with necrosis of surface epithelial cells, and cytoplasmic processes passed into and between surface cells of hyperplastic gill epithelium. The evidence points to the paramoebae as primary opportunistic pathogens causing mechanical and possibly chemical damage. Based on size and ultrastructure, the Paramoeba sp. most closely resembles P. pemaquidensis Page. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Diseases 12 5 481 492 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract. The normally free‐living amoeba Paramoeba sp. is associated with epithelial hyperplasia on the gills of Atlantic salmon, Salmo salar L., in Tasmania. Gill‐attached paramoebae were significantly larger than cultured ones. Unlike cultured paramoebae, gill‐attached ones had small electron‐dense, cytoplasmic deposits and small surface projections at the host‐parasite interface. Examination of sequential samples of Tasmanian salmon gills from spring to summer indicated that pathological changes in the gill filaments were associated only with the presence of Paramoeba the parasite was also associated with necrosis of surface epithelial cells, and cytoplasmic processes passed into and between surface cells of hyperplastic gill epithelium. The evidence points to the paramoebae as primary opportunistic pathogens causing mechanical and possibly chemical damage. Based on size and ultrastructure, the Paramoeba sp. most closely resembles P. pemaquidensis Page. |
format |
Article in Journal/Newspaper |
author |
ROUBAL, F. R. LESTER, R. J. G. FOSTER, C. K. |
spellingShingle |
ROUBAL, F. R. LESTER, R. J. G. FOSTER, C. K. Studies on cultured and gill‐attached Paramoeba sp. (Gymnamoebae: Paramoebidae) and the cytopathology of paramoebic gill disease in Atlantic salmon, Salmo salar L., from Tasmania |
author_facet |
ROUBAL, F. R. LESTER, R. J. G. FOSTER, C. K. |
author_sort |
ROUBAL, F. R. |
title |
Studies on cultured and gill‐attached Paramoeba sp. (Gymnamoebae: Paramoebidae) and the cytopathology of paramoebic gill disease in Atlantic salmon, Salmo salar L., from Tasmania |
title_short |
Studies on cultured and gill‐attached Paramoeba sp. (Gymnamoebae: Paramoebidae) and the cytopathology of paramoebic gill disease in Atlantic salmon, Salmo salar L., from Tasmania |
title_full |
Studies on cultured and gill‐attached Paramoeba sp. (Gymnamoebae: Paramoebidae) and the cytopathology of paramoebic gill disease in Atlantic salmon, Salmo salar L., from Tasmania |
title_fullStr |
Studies on cultured and gill‐attached Paramoeba sp. (Gymnamoebae: Paramoebidae) and the cytopathology of paramoebic gill disease in Atlantic salmon, Salmo salar L., from Tasmania |
title_full_unstemmed |
Studies on cultured and gill‐attached Paramoeba sp. (Gymnamoebae: Paramoebidae) and the cytopathology of paramoebic gill disease in Atlantic salmon, Salmo salar L., from Tasmania |
title_sort |
studies on cultured and gill‐attached paramoeba sp. (gymnamoebae: paramoebidae) and the cytopathology of paramoebic gill disease in atlantic salmon, salmo salar l., from tasmania |
publisher |
Wiley |
publishDate |
1989 |
url |
http://dx.doi.org/10.1111/j.1365-2761.1989.tb00559.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2761.1989.tb00559.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2761.1989.tb00559.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Diseases volume 12, issue 5, page 481-492 ISSN 0140-7775 1365-2761 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2761.1989.tb00559.x |
container_title |
Journal of Fish Diseases |
container_volume |
12 |
container_issue |
5 |
container_start_page |
481 |
op_container_end_page |
492 |
_version_ |
1800748019262423040 |