Radiodiagnostic method for studying swimbladder inflammation caused by Anguillicola crassus (Nematoda : Dracunculoidea)

The nematode Anguillicola crassus appeared in Europe about 15 yr ago, and has subsequently become recognised as a cause of major pathological lesions in the swimbladder of the European eel Anguilla anguilla. The radiographic method reported in this paper showed be a useful complement to diagnostic m...

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Bibliographic Details
Published in:Diseases of aquatic organisms 1998-10, Vol.34 (2), p.155-160
Main Authors: BEREGI, A, MOLNAR, K, BEKESI, L, SZEKELY, C
Format: Article
Language:English
Subjects:
Air Sacs - diagnostic imaging
Air Sacs - parasitology
Air Sacs - pathology
Anguilla - parasitology
Anguilla anguilla
Anguillicola crassus
Animal aquaculture
Animal productions
Animals
Biological and medical sciences
Dracunculoidea - isolation & purification
Fish Diseases - diagnostic imaging
Fish Diseases - pathology
Fundamental and applied biological sciences. Psychology
Inflammation - diagnostic imaging
Inflammation - pathology
Inflammation - veterinary
Pisciculture
Radiography
Respiratory Tract Infections - diagnostic imaging
Respiratory Tract Infections - pathology
Respiratory Tract Infections - veterinary
Spirurida Infections - diagnostic imaging
Spirurida Infections - pathology
Spirurida Infections - veterinary
Vertebrate aquaculture
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Summary:The nematode Anguillicola crassus appeared in Europe about 15 yr ago, and has subsequently become recognised as a cause of major pathological lesions in the swimbladder of the European eel Anguilla anguilla. The radiographic method reported in this paper showed be a useful complement to diagnostic methods that have so far been based exclusively on fish dissection. Using this method, the infection of the swimbladder and the severity of its pathological changes can be assessed in a reliable manner without causing damage to the fish. By analysing radiographs of 45 eels from Lake Balaton, 5 stages of swimbladder lesions were distinguished. The method enables the examiner to draw conclusions on the air, worm and exudate content of the swimbladder; however, data on thickening of the swimbladder wall can be obtained only indirectly. The radiograph also provides information on the air and worm content of the pneumatic duct. Results obtained by radiography showed good agreement with dissection findings. Radiographic results are compared with pathological findings obtained from fish dissections separately for each severity grade of infection.
ISSN:0177-5103
1616-1580
DOI:10.3354/dao034155