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Immersion challenge of na´ve 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]

DOI: doi:10.1111/jfd.13319

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 na´ve 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.áperurans‐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.áperurans 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.áperurans 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
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
Web of Science® Times Cited:2
Deposited By:Fisheries and Aquaculture
Deposited On:2021-01-14
Last Modified:2021-03-31
Downloads:0

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