Atlantic salmon, Salmo salar L. previously infected with Neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function
Previous studies have indicated that Atlantic salmon, Salmo salar L., affected by amoebic gill disease (AGD) are resistant to re-infection. These observations were based upon a comparison of gross gill lesion abundance between previously infected and nave control fish. Anecdotal evidence from Atlant...
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Online Access: | https://doi.org/10.1046/j.1365-2761.2003.00514.x http://www.ncbi.nlm.nih.gov/pubmed/14986939 http://ecite.utas.edu.au/27475 |
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ftunivtasecite:oai:ecite.utas.edu.au:27475 2023-05-15T15:29:29+02:00 Atlantic salmon, Salmo salar L. previously infected with Neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function Gross, KA Morrison, RN Butler, R Nowak, BF 2004 https://doi.org/10.1046/j.1365-2761.2003.00514.x http://www.ncbi.nlm.nih.gov/pubmed/14986939 http://ecite.utas.edu.au/27475 en eng Blackwell Publishing Ltd http://dx.doi.org/10.1046/j.1365-2761.2003.00514.x Gross, KA and Morrison, RN and Butler, R and Nowak, BF, Atlantic salmon, Salmo salar L. previously infected with Neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function, Journal of Fish Diseases, 27, (1) pp. 47-56. ISSN 0140-7775 (2004) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/14986939 http://ecite.utas.edu.au/27475 Agricultural and Veterinary Sciences Fisheries Sciences Fish Pests and Diseases Refereed Article PeerReviewed 2004 ftunivtasecite https://doi.org/10.1046/j.1365-2761.2003.00514.x 2019-12-13T21:08:11Z Previous studies have indicated that Atlantic salmon, Salmo salar L., affected by amoebic gill disease (AGD) are resistant to re-infection. These observations were based upon a comparison of gross gill lesion abundance between previously infected and nave control fish. Anecdotal evidence from Atlantic salmon farms in southern Tasmania suggests that previous infection does not protect against AGD as indicated by a lack of temporal change in freshwater bathing intervals. Experiments were conducted to determine if previous infection of Atlantic salmon with Neoparamoeba sp. would provide protection against challenge and elucidate the immunological basis of any protection. Atlantic salmon were infected with Neoparamoeba sp. for 12 days then treated with a 4-h freshwater bath. Fish were separated into two groups and maintained in either sea water or fresh water for 6 weeks. Fish were then transferred to one tank with a nave control group and challenged with Neoparamoeba sp. Fish kept in sea water had lower mortality rates compared with first time exposed and freshwater maintained fish, however, these data are believed to be biased by ongoing mortalities during the seawater maintenance phase. Phagocyte function decreased over exposure time and freshwater maintained fish demonstrated an increased ability to mount a specific immune response. These results suggest that under the challenge conditions herein described, antigen exposure via infection does not induce protection to subsequent AGD. Article in Journal/Newspaper Atlantic salmon Salmo salar eCite UTAS (University of Tasmania) Journal of Fish Diseases 27 1 47 56 |
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eCite UTAS (University of Tasmania) |
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English |
topic |
Agricultural and Veterinary Sciences Fisheries Sciences Fish Pests and Diseases |
spellingShingle |
Agricultural and Veterinary Sciences Fisheries Sciences Fish Pests and Diseases Gross, KA Morrison, RN Butler, R Nowak, BF Atlantic salmon, Salmo salar L. previously infected with Neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function |
topic_facet |
Agricultural and Veterinary Sciences Fisheries Sciences Fish Pests and Diseases |
description |
Previous studies have indicated that Atlantic salmon, Salmo salar L., affected by amoebic gill disease (AGD) are resistant to re-infection. These observations were based upon a comparison of gross gill lesion abundance between previously infected and nave control fish. Anecdotal evidence from Atlantic salmon farms in southern Tasmania suggests that previous infection does not protect against AGD as indicated by a lack of temporal change in freshwater bathing intervals. Experiments were conducted to determine if previous infection of Atlantic salmon with Neoparamoeba sp. would provide protection against challenge and elucidate the immunological basis of any protection. Atlantic salmon were infected with Neoparamoeba sp. for 12 days then treated with a 4-h freshwater bath. Fish were separated into two groups and maintained in either sea water or fresh water for 6 weeks. Fish were then transferred to one tank with a nave control group and challenged with Neoparamoeba sp. Fish kept in sea water had lower mortality rates compared with first time exposed and freshwater maintained fish, however, these data are believed to be biased by ongoing mortalities during the seawater maintenance phase. Phagocyte function decreased over exposure time and freshwater maintained fish demonstrated an increased ability to mount a specific immune response. These results suggest that under the challenge conditions herein described, antigen exposure via infection does not induce protection to subsequent AGD. |
format |
Article in Journal/Newspaper |
author |
Gross, KA Morrison, RN Butler, R Nowak, BF |
author_facet |
Gross, KA Morrison, RN Butler, R Nowak, BF |
author_sort |
Gross, KA |
title |
Atlantic salmon, Salmo salar L. previously infected with Neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function |
title_short |
Atlantic salmon, Salmo salar L. previously infected with Neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function |
title_full |
Atlantic salmon, Salmo salar L. previously infected with Neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function |
title_fullStr |
Atlantic salmon, Salmo salar L. previously infected with Neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function |
title_full_unstemmed |
Atlantic salmon, Salmo salar L. previously infected with Neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function |
title_sort |
atlantic salmon, salmo salar l. previously infected with neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function |
publisher |
Blackwell Publishing Ltd |
publishDate |
2004 |
url |
https://doi.org/10.1046/j.1365-2761.2003.00514.x http://www.ncbi.nlm.nih.gov/pubmed/14986939 http://ecite.utas.edu.au/27475 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://dx.doi.org/10.1046/j.1365-2761.2003.00514.x Gross, KA and Morrison, RN and Butler, R and Nowak, BF, Atlantic salmon, Salmo salar L. previously infected with Neoparamoeba sp. are not resistant to re-infection and have suppressed phagocyte function, Journal of Fish Diseases, 27, (1) pp. 47-56. ISSN 0140-7775 (2004) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/14986939 http://ecite.utas.edu.au/27475 |
op_doi |
https://doi.org/10.1046/j.1365-2761.2003.00514.x |
container_title |
Journal of Fish Diseases |
container_volume |
27 |
container_issue |
1 |
container_start_page |
47 |
op_container_end_page |
56 |
_version_ |
1766359904624312320 |