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Immersion challenge of naïve Atlantic salmon with cultured Nolandella sp. and Pseudoparamoeba sp. did not increase the severity of Neoparamoeba perurans-induced amoebic gill disease (AGD)
Citation
English, CJ and Botwright, NA and Adams, MB and Barnes, AC and Wynne, JW and Lima, PC and Cook, MT, Immersion challenge of naive Atlantic salmon with cultured Nolandella sp. and Pseudoparamoeba sp. did not increase the severity of Neoparamoeba perurans-induced amoebic gill disease (AGD), Journal of Fish Diseases, 44, (2) pp. 149-160. ISSN 0140-7775 (2021) [Refereed Article]
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Abstract
Amoebic gill disease (AGD) is one of the main health issues impacting farmed Atlantic salmon. Neoparamoeba perurans causes AGD; however, a diversity of other amoeba species colonizes the gills and there is little understanding of whether they are commensal or potentially involved in different stages of gill disease development. Here, we conduct in vivo challenges of naïve Atlantic salmon with cultured Nolandella sp. and Pseudoparamoeba sp. to investigate their pathogenicity to Atlantic salmon gills. Additionally, we assessed whether the presence of Nolandella sp. and Pseudoparamoeba sp. influences the onset and/or severity of N. perurans‐induced AGD. All three strains attached and multiplied on the gills according to qPCR analysis. Furthermore, minor gross gill lesions and histological changes were observed post‐exposure. While N. perurans was found associated with classical AGD lesions, Nolandella sp. and Pseudoparamoeba sp. were not found associated with lesion sites and these lesions did not meet the expected composite of histopathological changes for AGD. Moreover, the presence of these non‐N. perurans species did not significantly increase the severity of AGD. This trial provides evidence that cultured Nolandella sp. and Pseudoparamoeba sp. do not induce AGD and do not influence the severity of AGD during the early stages of development.
Item Details
Item Type: | Refereed Article |
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Keywords: | etiology, Amoebozoa, aquaculture, gill disease, histopathology |
Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Fisheries sciences |
Research Field: | Aquaculture |
Objective Division: | Animal Production and Animal Primary Products |
Objective Group: | Fisheries - aquaculture |
Objective Field: | Aquaculture crustaceans (excl. rock lobster and prawns) |
UTAS Author: | Adams, MB (Dr Mark Adams) |
ID Code: | 142395 |
Year Published: | 2021 |
Deposited By: | Fisheries and Aquaculture |
Deposited On: | 2021-01-14 |
Last Modified: | 2021-01-19 |
Downloads: | 0 |
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