Document Detail

Cardiac abnormality with associated hernia in farmed rainbow trout Oncorhynchus mykiss.
MedLine Citation:
PMID:  12180706     Owner:  NLM     Status:  MEDLINE    
A new type of cardiac malformation in rainbow trout Oncorhynchus mykiss from a broodstock fish farm is described. The ventricle of affected fish was located dorsodextrally to the atrium, while the latter was saccular, grossly enlarged and protruded through the muscles of the ventral body wall, forming a hernia covered only by dermis and epidermis. Histopathological changes included hypoplasia of the outer compact layer of the ventricular myocardium and severe distension of trabecular structures within the ventricle and atrium. Affected fish tolerated stress very poorly, and the majority of the affected fish died during the freshwater period. The causation(s) are not known, but hereditary and environmental factors are likely, as no infectious agents were isolated or detected microscopically.
Trygve T Poppe; Renate Johansen; Brit Tørud
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Diseases of aquatic organisms     Volume:  50     ISSN:  0177-5103     ISO Abbreviation:  Dis. Aquat. Org.     Publication Date:  2002 Jul 
Date Detail:
Created Date:  2002-08-15     Completed Date:  2002-09-26     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  8807037     Medline TA:  Dis Aquat Organ     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  153-5     Citation Subset:  IM    
Norwegian School of Veterinary Science, Institute of Morphology, Genetics and Aquatic Biology, Oslo.
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MeSH Terms
Fish Diseases / etiology,  genetics*
Heart Defects, Congenital / etiology,  genetics,  veterinary*
Hernia, Ventral / etiology,  genetics,  veterinary*
Myocardium / pathology
Oncorhynchus mykiss*

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