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Fatal encephalitis due to the scuticociliate Uronema nigricans in sea-caged, southern bluefin tuna Thunnus maccoyii

Citation

Munday, BL and ODonoghue, PJ and Watts, M and Rough, KM and Hawkesford, TM, Fatal encephalitis due to the scuticociliate Uronema nigricans in sea-caged, southern bluefin tuna Thunnus maccoyii, Diseases of Aquatic Organisms, 30, (1) pp. 17-25. ISSN 0177-5103 (1997) [Refereed Article]

DOI: doi:10.3354/dao030017

Abstract

A syndrome characterized by atypical swimming behaviour followed by rapid death was first reported in captive southern bluefin tuna Thunnus maccoyii (Castelnau) in the winter of 1993. The cause of this behaviour was found to be a parasitic encephalitis due to the scuticociliate Uronema nigricans (Mueller). Based on parasitological and histological findings, it is proposed that the parasites initially colonise the olfactory rosettes and then ascend the olfactory nerves to eventually invade the brain. Possible epidemiological factors involved in the pathogenesis of the disease include water temperature (<18°C) and the immune status of the fish.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
Author:Munday, BL (Dr Barry Munday)
Author:Watts, M (Dr Marianne Watts)
Author:Rough, KM (Ms Kirsten May Rough)
Author:Hawkesford, TM (Ms Tiina Mall Hawkesford)
ID Code:10913
Year Published:1997
Web of Science® Times Cited:84
Deposited By:TAFI - Aquaculture
Deposited On:1997-08-01
Last Modified:2011-08-11
Downloads:0

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