ニホンウナギの Edwardsiella tarda 感染症の病理組織学的研究-Ⅲ.: 自然感染-稚ウナギ

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1) Edwardsiella tarda に感染したシラス期とクロコ期のウナギを病理組織学的に検討した。2) その結果, これら稚ウナギでも本菌感染症の病状に二種類の発現形がみられた。3) シラス期の病魚の感染病巣では組織の融解壊死が著しいが, 好中球反応は弱かった。4) クロコ期の病魚の感染病巣は化膿性炎で特徴づけられた。5) シラス期とクロコ期のウナギとも感染に際して血管間葉系組織の反応が現われていた。The histopathological observation was made on diseased elvers and anguilletes infected with Edwardsiella tarda. Diseased fish showed a showed a swelling accompanying with minute hemorrhages and often perforation either in the liver or kidney region of the trunk. Histopathologically the diseasecould be classified in two forms as in the case of big eels.1) Interstitial nephritis : In this form the degree of the suppurative reaction was weak as compared with the case with big eels. In the early stages of the disease small necrotic lesions appeared in the hematopoietic tissue of the kidney. In the advanced stages necrotic lesions developed into large ulcers. In the ulcerative lesions bacterial multiplication and liquefaction of the involved tissues were very marked. Metastatic lesions were common in the various organs.2) Hepatitis : In anguilletes, a large liquefactive lesion appeared in the liver in the advanced stages. In elvers small abscesses were observed in the liver in the early stages. In the advanced stages a large ulcerative abscess was formed in the liver, and suppurative peritonitis and omentitis spreaded. The spleen, thymus and hematopoietic tissues were hyperplastic.
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ニホンウナギの Edwardsiella tarda 感染症の病理組織学的研究-Ⅲ.: 自然感染-稚ウナギ

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