テラピアのエドワジエラ症の病理組織学的研究- I : 自然感染例

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The present authors histopathologically studied on tilapia (Tilapia nilotica) infected with Edwardsiella tarda. The diseased fish exhibiting pale body-color, swollen abdomen due to dropsy, protruded blood-shot anus and cloudy eye, were collected at fish-farm ponds in Nara and Osaka Prefectures in 1981. The fish displayed at autupsy much ascites and the formation of ｆine white nodules in the liver,　spleen, kidney, gills and rarely in the intestine alone. Visceral infected lesions exhibited various histopathological maniｆestaｔion ; 1) focal necrosis with diffuse bacterial multiplication, 2) focal necrosis followed by infiltration of many macrophages, which mostly underwent intracellular multiplication of the bacteria and 3) granulomas, which have not yet been observed in gills and intestine.
1982-10-01