Respiratory pathogenesis of amoebic gill disease (AGD) in experimentally infected Atlantic salmon Salmo salar
The aim of this study was to investigate the respiratory responses of Atlantic salmon, Salmo salar, experimentally affected with amoebic gill disease (AGD). In Series I, arterial blood samples were taken over a 96 h period following amoebae addition to examine potential respiratory effects associate...
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ftunivtasecite:oai:ecite.utas.edu.au:38290 2023-05-15T15:30:24+02:00 Respiratory pathogenesis of amoebic gill disease (AGD) in experimentally infected Atlantic salmon Salmo salar Leef, MJ Harris, J Powell, MD 2005 https://doi.org/10.3354/dao066205 http://www.ncbi.nlm.nih.gov/pubmed/16261935 http://ecite.utas.edu.au/38290 en eng Inter-Research http://dx.doi.org/10.3354/dao066205 Leef, MJ and Harris, J and Powell, MD, Respiratory pathogenesis of amoebic gill disease (AGD) in experimentally infected Atlantic salmon Salmo salar , Diseases of Aquatic Organisms, 66, (3) pp. 205-213. ISSN 0177-5103 (2005) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/16261935 http://ecite.utas.edu.au/38290 Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Refereed Article PeerReviewed 2005 ftunivtasecite https://doi.org/10.3354/dao066205 2019-12-13T21:16:00Z The aim of this study was to investigate the respiratory responses of Atlantic salmon, Salmo salar, experimentally affected with amoebic gill disease (AGD). In Series I, arterial blood samples were taken over a 96 h period following amoebae addition to examine potential respiratory effects associated with initial exposure. No major significant treatment effects were found between fish exposed to amoebae and control (non-exposed) fish. Arterial pH (pH a) was seen to be significantly elevated at 48 h in AGD fish relative to the 0 h time point. To investigate the long-term respiratory effects associated with infection, fish were similarly exposed to amoebae and sampled over a 16 d period. As for Series I, caudal blood pH was significantly elevated by Day 2 (48 h) compared to the pre (Day 0)-time point, suggesting that initial exposure to amoebae and/or amoebae attachment may have induced an initial respiratory alkalosis via increased ventilation frequency and/or amplitude. From Day 7 onwards, and coinciding with a significant increase in the percentage of affected gill filaments, blood pH decreased significantly, possibly indicating the onset of the characteristic respiratory acidosis that has previously been described for experimentally AGD-affected Atlantic salmon. Although fish in this study showed up to 90 % AGD-affected filaments, the corresponding respiratory results do not reflect a major acid-base disturbance. Therefore, the findings from the present study support the contention that, although AGD only affects the gill, AGD-associated mortality in Atlantic salmon may not be primarily associated with respiratory failure. Inter-Research 2005. Article in Journal/Newspaper Atlantic salmon Salmo salar eCite UTAS (University of Tasmania) Diseases of Aquatic Organisms 66 205 213 |
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eCite UTAS (University of Tasmania) |
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language |
English |
topic |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
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Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Leef, MJ Harris, J Powell, MD Respiratory pathogenesis of amoebic gill disease (AGD) in experimentally infected Atlantic salmon Salmo salar |
topic_facet |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
description |
The aim of this study was to investigate the respiratory responses of Atlantic salmon, Salmo salar, experimentally affected with amoebic gill disease (AGD). In Series I, arterial blood samples were taken over a 96 h period following amoebae addition to examine potential respiratory effects associated with initial exposure. No major significant treatment effects were found between fish exposed to amoebae and control (non-exposed) fish. Arterial pH (pH a) was seen to be significantly elevated at 48 h in AGD fish relative to the 0 h time point. To investigate the long-term respiratory effects associated with infection, fish were similarly exposed to amoebae and sampled over a 16 d period. As for Series I, caudal blood pH was significantly elevated by Day 2 (48 h) compared to the pre (Day 0)-time point, suggesting that initial exposure to amoebae and/or amoebae attachment may have induced an initial respiratory alkalosis via increased ventilation frequency and/or amplitude. From Day 7 onwards, and coinciding with a significant increase in the percentage of affected gill filaments, blood pH decreased significantly, possibly indicating the onset of the characteristic respiratory acidosis that has previously been described for experimentally AGD-affected Atlantic salmon. Although fish in this study showed up to 90 % AGD-affected filaments, the corresponding respiratory results do not reflect a major acid-base disturbance. Therefore, the findings from the present study support the contention that, although AGD only affects the gill, AGD-associated mortality in Atlantic salmon may not be primarily associated with respiratory failure. Inter-Research 2005. |
format |
Article in Journal/Newspaper |
author |
Leef, MJ Harris, J Powell, MD |
author_facet |
Leef, MJ Harris, J Powell, MD |
author_sort |
Leef, MJ |
title |
Respiratory pathogenesis of amoebic gill disease (AGD) in experimentally infected Atlantic salmon Salmo salar |
title_short |
Respiratory pathogenesis of amoebic gill disease (AGD) in experimentally infected Atlantic salmon Salmo salar |
title_full |
Respiratory pathogenesis of amoebic gill disease (AGD) in experimentally infected Atlantic salmon Salmo salar |
title_fullStr |
Respiratory pathogenesis of amoebic gill disease (AGD) in experimentally infected Atlantic salmon Salmo salar |
title_full_unstemmed |
Respiratory pathogenesis of amoebic gill disease (AGD) in experimentally infected Atlantic salmon Salmo salar |
title_sort |
respiratory pathogenesis of amoebic gill disease (agd) in experimentally infected atlantic salmon salmo salar |
publisher |
Inter-Research |
publishDate |
2005 |
url |
https://doi.org/10.3354/dao066205 http://www.ncbi.nlm.nih.gov/pubmed/16261935 http://ecite.utas.edu.au/38290 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://dx.doi.org/10.3354/dao066205 Leef, MJ and Harris, J and Powell, MD, Respiratory pathogenesis of amoebic gill disease (AGD) in experimentally infected Atlantic salmon Salmo salar , Diseases of Aquatic Organisms, 66, (3) pp. 205-213. ISSN 0177-5103 (2005) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/16261935 http://ecite.utas.edu.au/38290 |
op_doi |
https://doi.org/10.3354/dao066205 |
container_title |
Diseases of Aquatic Organisms |
container_volume |
66 |
container_start_page |
205 |
op_container_end_page |
213 |
_version_ |
1766360854313304064 |