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Dermocystidium sp. infection in farmed Murray cod, Maccullochella peelii


Shamsi, S and Zhu, X and Barton, DP and Dang, M and Freire, R and Nowak, BF, Dermocystidium sp. infection in farmed Murray cod, Maccullochella peelii, Aquaculture, 528 Article 735596. ISSN 0044-8486 (2020) [Refereed Article]

Copyright Statement

2020 Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.aquaculture.2020.735596


Murray cod (Maccullochella peelii (Mitchell, 1838)) is an iconic Australian species, initially farmed mostly for stocking but now also for human consumption. Here, we report an infection with Dermocystidium sp., class Mesomycetozoea, order Dermocystida in the gills of Murray cod, from a hatchery in south-eastern Australia. Based on phylogenetic analyses of the 18S ribosomal DNA the parasite was closely related to D. salmonis, however the size of the spores was smaller than that reported for D. salmonis in other parts of the world. Further studies using additional analyses including ultrastructure of the spores would be useful for elucidating the identification of the microorganism. Histopathology showed inflammatory response and epithelial hyperplasia resulting in lamellar fusion particularly in association with the parasite. The condition was diagnosed as branchitis caused by a co-infection with Dermocystidium and epitheliocystis, with Dermocystidium being the dominant pathogen.

Item Details

Item Type:Refereed Article
Keywords:aquatic animal health, biosecurity, aquaculture, seafood safety, environment health, introduced invasive species
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Fish pests and diseases
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Aquaculture fin fish (excl. tuna)
UTAS Author:Dang, M (Ms Mai Dang)
UTAS Author:Nowak, BF (Professor Barbara Nowak)
ID Code:140956
Year Published:2020
Web of Science® Times Cited:2
Deposited By:Fisheries and Aquaculture
Deposited On:2020-09-16
Last Modified:2021-02-15

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