Document Detail

Diseases of farmed Atlantic salmon Salmo salar associated with infections by the microsporidian Paranucleospora theridion.
MedLine Citation:
PMID:  21553567     Owner:  NLM     Status:  In-Process    
The microsporidian Paranucleospora theridion was discovered in Atlantic salmon Salmo salar suffering from proliferative gill disease in a marine farm in western Norway in 2008. The parasite develops in cells of the reticuloendothelial system, cells important for normal immune function. The aim of this study was to see if P. theridion could play a part in some of the diseases with unclear causes in salmon production in Norway, i.e. proliferative gill disease (PGI), pancreas disease (PD), heart and skeletal muscle inflammation (HSMI) and cardiomyopathy syndrome (CMS). P. theridion was present in all areas with salmon farming in Norway, but high prevalence and densities of the parasite in salmon and salmon lice were only seen in southern Norway. This region is also the main area for PGI and PD in Norway. Quantification of pathogens associated with PGI, PD, HSMI and CMS diagnoses showed that P. theridion levels are high in southern Norway, and may therefore play a role in susceptibility and disease development. However, among the different diagnoses, fish with PGI are particularly heavily infected with P. theridion. Therefore, P. theridion appears as a possible primary agent in cases with high mortality in connection with PGI in western Norway.
S Nylund; L Andersen; I Saevareid; H Plarre; K Watanabe; C E Arnesen; E Karlsbakk; A Nylund
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Diseases of aquatic organisms     Volume:  94     ISSN:  0177-5103     ISO Abbreviation:  Dis. Aquat. Org.     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-05-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8807037     Medline TA:  Dis Aquat Organ     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  41-57     Citation Subset:  IM    
Department of Biology, University of Bergen, 5020 Bergen, Norway.
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