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Severe, chronic proliferative kidney disease (PKD) induced in rainbow trout Oncorhynchus mykiss held at a constant 18°C

2005; Inter-Research; Volume: 66; Linguagem: Inglês

10.3354/dao066221

1616-1580

David J. Morris, HW Ferguson, Alexandra Adams,

Fish Ecology and Management Studies

DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials DAO 66:221-226 (2005) - doi:10.3354/dao066221 Severe, chronic proliferative kidney disease (PKD) induced in rainbow trout Oncorhynchus mykiss held at a constant 18°C D. J. Morris*, H. W. Ferguson, A. Adams Scottish Fish Immunology Research Centre, Institute of Aquaculture, University of Stirling, Stirling FK9 4LA, UK *Email: d.j.morris@stir.ac.uk ABSTRACT: Proliferative kidney disease (PKD), caused by the myxozoan parasite Tetracapsuloides bryosalmonae, is well documented as a seasonal disease of rainbow trout Oncorhynchus mykiss. Water temperatures influence the course of the infection both within the fish and the invertebrate host, the recovery of fish from the disease being accelerated with decreasing water temperatures. During this study, groups of rainbow trout were held at a constant temperature (18°C) for a sustained period of time following initial exposure to T. bryosalmonae. While the majority of these fish had recovered from the clinical disease after 9 mo, 10% remained infected, showing clinical signs of disease. A histological study revealed that the majority exhibited very high parasite loads and unusually severe symptoms of PKD. This demonstrates that while most rainbow trout can recover from PKD independent of water temperature, there exists a sub-population that cannot. KEY WORDS: Tetracapsuloides · Myxozoa · Malacosporea · Temperature Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in DAO Vol. 66, No. 3. Online publication date: September 23, 2005 Print ISSN: 0177-5103; Online ISSN: 1616-1580 Copyright © 2005 Inter-Research.