A Histopathological Study on Viral Encephalitis of European Eel

• Main Authors: Miyazaki Teruo, 宮崎 照雄
• Format: Report
• Language: English
• Published: Faculty of Fisheries, Mie University 1985
• Subjects: viral encephalitis; european eel; histopathology; 663; Anguilla anguilla
• Online Access: http://hdl.handle.net/10076/2795; https://mie-u.repo.nii.ac.jp/?action=repository_uri&item_id=5614; https://mie-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5614&item_no=1&attribute_id=17&file_no=1

A viral disease occurred among elvers of European eel,Anguilla anguilla transported from France to Mie Prefecture in May of 1977. The diseased fish showed whirling and spiral motion, and white body coloration. On histopathological examinations,some of them showed necrosis in the brain,spinal cord and retina of eyeball.The other fish showed necrosis in the liver,spleen,kidney,heart,digestive tracts and the lateral musculature as well as in the brain.Above all necrotic lesions showed no invasion of bacteria and parasites. A bath with a 0.6% salt solution was effective for the survival of the diseased fish. After the treatment,inflammatory reactions were found to occur in the nectrotic lesions of the brain.A virus was isolated from the diseased fish and showed a cytopathic effect in inoculated RTG-2 cells, similar to that of EVEX(SANO et al.1977).The author proposes to call this disease ‟ Viral Encephalitis of European Eel”.