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

Munday, B. L., O'Donoghue, P. J., Watts, M., Rough, K. and Hawkesford, T. (1997) Fatal encephalitis due to the scuticociliate Uronema nigricans in sea-caged, southern bluefin tuna Thunnus maccoyii. Diseases of Aquatic Organisms, 30 1: 17-25. doi:10.3354/dao030017

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Author Munday, B. L.
O'Donoghue, P. J.
Watts, M.
Rough, K.
Hawkesford, T.
Title Fatal encephalitis due to the scuticociliate Uronema nigricans in sea-caged, southern bluefin tuna Thunnus maccoyii
Formatted title
Fatal encephalitis due to the scuticociliate Uronema nigricans in sea-caged, southern bluefin tuna Thunnus maccoyii
Journal name Diseases of Aquatic Organisms   Check publisher's open access policy
ISSN 0177-5103
1616-1580
Publication date 1997-07
Sub-type Article (original research)
DOI 10.3354/dao030017
Open Access Status File (Publisher version)
Volume 30
Issue 1
Start page 17
End page 25
Total pages 9
Place of publication Oldendorf, Germany
Publisher Inter-Research
Language eng
Formatted 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 Uronemanigricans (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.
Keyword Southern bluefin tuna
Thunnus maccoyii
Scuticociliate
Uronema nigricans
Encephalitis
Neuritis
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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