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The effect of antimicrobial treatment upon the gill bacteriome of Atlantic salmon (Salmo salar L.) and progression of Amoebic Gill Disease (AGD) in vivo

Citation

Slinger, J and Adams, MB and Stratford, CN and Rigby, M and Wynne, JW, The effect of antimicrobial treatment upon the gill bacteriome of Atlantic salmon (Salmo salar L.) and progression of Amoebic Gill Disease (AGD) in vivo, Microorganisms, 9, (5) Article 987. ISSN 2076-2607 (2021) [Refereed Article]


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Copyright 2021 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3390/microorganisms9050987

Abstract

Branchial surfaces of finfish species contain a microbial layer rich in commensal bacteria which can provide protection through competitive colonization and production of antimicrobial products. Upon disturbance or compromise, pathogenic microbiota may opportunistically infiltrate this protective barrier and initiate disease. Amoebic gill disease (AGD) is a globally significant health condition affecting salmonid mariculture. The current study examined whether altering the diversity and/or abundance of branchial bacteria could influence the development of experimentally induced AGD. Here, we challenged Atlantic salmon (Salmo salar) with Neoparamoeba perurans in a number of scenarios where the bacterial community on the gill was altered or in a state of instability. Administration of oxytetracycline (in-feed) and chloramine-T (immersion bath) significantly altered the bacterial load and diversity of bacterial taxa upon the gill surface, and shifted the community profile appreciably. AGD severity was marginally higher in fish previously subjected to chloramine-T treatment following 21 days post-challenge. This research suggests that AGD progression and severity was not clearly linked to specific bacterial taxa present in these systems. However, we identified AGD associated taxa including known pathogenic genus (Aliivibrio, Tenacibaculum and Pseudomonas) which increased in abundance as AGD progressed. Elucidation of a potential role for these bacterial taxa in AGD development is warranted.

Item Details

Item Type:Refereed Article
Keywords:aquaculture, salmon, AGD, antimicrobial, amoeba, gill, microbiome, perurans
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 fin fish (excl. tuna)
UTAS Author:Slinger, J (Mr Joel Slinger)
UTAS Author:Adams, MB (Dr Mark Adams)
ID Code:147460
Year Published:2021
Web of Science® Times Cited:1
Deposited By:Fisheries and Aquaculture
Deposited On:2021-11-02
Last Modified:2021-12-07
Downloads:0

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