① テラピアを用いてE. tarda の実験感染を行った。② 実験感染魚について, 24, 48, 96 および120時間と経時的に肉眼的, 解剖学的および病理組織学的観察を行った。③ その結果, 実験感染魚において自然感染魚にみられたいくつかの病徴が再現されることがわかった。
Tilapia, Tilapia mosambica, were experimentally infected by intramuscular injection with 10⁸ CFU/ml of Edwardsiella tarda (J3N strain) isolated from diseased tilapia, and examined on 24, 48, 96 and 120 hours after injection. Fish 24 and 48 hours after the injection showed swollen and erosious lesions and muscular necrosis with bacterial multiplication and inflammatory calls at the injected areas, and focal necrosis with bacteria-laden inflammatory cells in the liver, spleen, kidney and heart. Fish 96 and 120 hours after injection were moribund showing swollen and ulcered lesions at the injected areas, small white nodules in the liver and spleen. The injected lesions showed muscular necrosis with bacterial multiplication and inflammatory cells. The liver, spleen and hematopoietic tissue showed focal accumulation of macrophages and production of granulomas in the infected lesions. The heart showed focal necrosis with bacterial multiplication and inflammatory cells. Gills showed bacterial embolism in lamellae. These histopathological signs of experimentally infected tilapia resembled to those of naturally infected fish.
雑誌名
魚病研究
巻
21
号
2
ページ
95 - 99
発行年
1986-06-01
ISSN
0388-788X
書誌レコードID
AN00063165
フォーマット
application/pdf
著者版フラグ
publisher
日本十進分類法
663
その他のタイトル
A Histopathological Study of Edwardsiellosis in Tilapia-Experimental Infection
テラピアのEdwardsiella tarda 感染症の病理組織学的研究 - 実験感染魚
AN000631650210202.pdf
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