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ID 28686
本文ファイル
別タイトル
人為感染させたニホンウナギにおける非定型Aeromonas salmonicidaの消長
著者
Miyakawa, Munenori
Muroga, Kiyokuni
Kamito, Kumiko
NDC
動物学
抄録
ウナギ病魚(頭部潰瘍病)由来の非定型A.salmonicida株をニホンウナギに接種し, 各組織における生菌数の消長を培養法により調べた。その結果, 接種した筋肉組織では1時間後から死亡直前まで10 7-9CFU/gの菌数が検出されたが, 脾臓および腎臓では10 2-5CFU/gと低く, 血液および脳からは殆ど検出されなかった。また, 魚の皮膚に切り傷をつけて感染を図った場合にも同様の結果が得られ, 本病はウナギの他の細菌感染症とは異なり終始局所感染の形をとることが明らかになった。
抄録(英)
The multiplication and distribution of an atypical Aeromonas salmonicida strain, which was isolated as a causative agent of "head ulcer disease" of cultured eels, in artificially infected Japanese eels (Anguilla japonica) were studied by bacteriological culture technique. When the eels were injected intramuscularly with a lethal dose of the atypical A. salmonicida strain at 20°C, the pathogen was recovered at high concentrations (10^7-10^9 CFU/g) from the muscle of the injected site throughout the course of infection. But in the spleen and kidney very small numbers of the pathogen were detected even at the moribund stage, and the blood and brain were almost aseptic. A similar result was obtained in the eels which were artificially injured on the skin and infected with the pathogen. These data indicate that the disease does not attain to distinct septicemic condition but the local proliferation of the pathogen will be the death of the host fish, and this pathological feature is in a striking contrast to other bacterial infections of eels. It was also found that the bacterial growth was significantly inhibited both in vitro and in vivo at 30°C, which uggests that temperature manipulation of pond water will be an effective measure to control the disease.
掲載誌名
魚病研究
24巻
1号
開始ページ
23
終了ページ
28
出版年月日
1989-03
出版者
日本魚病学会
ISSN
0388-788X
1881-7335
NCID
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 1989 The Japanese Society of Fish Pathology
部局名
生物圏科学研究科