魚病研究
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11 巻 , 3 号
選択された号の論文の8件中1~8を表示しています
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  • 宮崎 照雄, 江草 周三
    11 巻 (1976 - 1977) 3 号 p. 127-131
    公開日: 2009/10/26
    ジャーナル フリー
     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。
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  • 楠田 理一, 豊嶋 利雄
    11 巻 (1976 - 1977) 3 号 p. 133-139
    公開日: 2009/10/26
    ジャーナル フリー
     1. 高知県の養殖ハマチの病魚から分離されたPseudomonasの細菌学的性状を明らかにする目的で,既知のP.fluorescensとP. putidaを対照として同定試験を行なった。2. その結果,本菌はブドウ糖を酸化的に分解し,フルオレシンを産生し,グルコン酸を酸化するが,ゼラチンを液化せず,トレハロースやイノシトールを分解しないなどの性状を示した。3. 本菌と対照菌株との類似値はP.putida ATCC 12633株に対しては83%と90%,P.fluorescens ATCC 13525株に対しては79%と82%となった。以上のことから,本菌をP.putidaに同定した。
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  • 室賀 清邦, 城 泰彦, 西淵 光昭
    11 巻 (1976 - 1977) 3 号 p. 141-145
    公開日: 2010/02/10
    ジャーナル フリー
    In 1975, a new vibriosis occurred in eels (Anguilla japonica and A. anguilla) cultured in Tokushima Prefecture in Shikoku Island of Japan. The disease prevailed in brackish water ponds (Cl-2-6‰) during summer and early autumn, when the water temperature of culture ponds ranged from 20°C to 30°C.
    The causative Vibrio seems to be classified as Vibrio anguillarum B type (V. anguillarum f. anguillicida) suggested by NYBELIN (1935), but this type can no longer be included in V. anguillarum listed in Bergey's Manual of Determinative Bacteriology 8th ed. Assuming that V. anguillarum B type is independent of V. anguillarum, the present isolate is classified as V. anguillicida BRUUN and HEIBERG 1932.
    On the other hand, in comparison with Vibrios listed in Bergey's Manual the characteristics of the present isolate are closely resemble to those of V. fischeri.
    Thus, further investigation are necessary before the taxonomic status of the present Vibrio is determined.
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  • 室賀 清邦, 西淵 光昭, 城 泰彦
    11 巻 (1976 - 1977) 3 号 p. 147-151
    公開日: 2010/02/10
    ジャーナル フリー
    In the previous report biochemical characteristics of an isolate from a vibriosis in eels were presented and the taxonomic status of the isolate was discussed, though a definite conclusion could not be drawn. In this paper, physiological characteristics and pathogenicity of the organism are described.
    The experimental results are summarized as follows.
    1) Effects of sodium chloride, temperature and pH on the growth of the organism: It grew in nutrient broth at NaCl 0.1-4% (optimum range 1-2%), and in peptone water at temperatures from 18°C to 39°C (optimum 30-35°C) and at pH 6-10.
    2) Pathogenicity to eel (Anguilla japonica) and mouse: The organism injected intramuscularly killed eels at 18, 20 and 26°C, but not at 15°C. It also killed mice.
    These results coincide with the fact that the vibriosis due to the organism prevails mainly in brackish-water ponds and at the water temperatures above 18°C.
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  • 保科 利一, 西村 定一
    11 巻 (1976 - 1977) 3 号 p. 153-157
    公開日: 2009/10/26
    ジャーナル フリー
     1.群馬県吾妻川上流の一養鱒場で飼育中のヤマメ2年魚の鰓に寄生の見られたSalmincota属の1種を観察し,その形態的特徴からS. californiensis (DANA, 1953) KABATA, 1969に同定した。2.S. californiensisに関し,KABATA(1969)の記記載と著者等の観察とは,雌に関してはよく一致するが,雄についてのKABATA et al. (1973)のの記載とは若干の差異が発見された。
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  • 大西 圭二, 室賀 清邦
    11 巻 (1976 - 1977) 3 号 p. 159-165
    公開日: 2009/10/26
    ジャーナル フリー
    Populations of rainbow trout (Salmo gairdneri) in freshwater ponds in Japan are often attacked by vibriosis. The causative bacterium was identified as Vibrio piscium var. japonicus by HOSHINA in 1957. But the species is now considered as a synonym of V. anguillarum.
    From 1973 to 1976, the present authors studied the biochemical characteristics of 22 strains which were isolated from diseased rainbow trout cultured in ponds in various districts of Japan.
    All the strains differ from V. anguillarum in their properties that they show poor growth on standard nutrient agar and fail to decompose arginine, to ferment mannose and mannitol, and to produce indole.
    Although further studies are needed to determine the exact taxonomic position of the isolates described here, the authors gave a tentative name of Vibrio sp. RT group to the 22 strains for the convenience of future studies.
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  • 中島 健次, 江草 周三
    11 巻 (1976 - 1977) 3 号 p. 167-170
    公開日: 2009/10/26
    ジャーナル フリー
    Observations were made with the scanning electron microscope (SEM) on two groups of microsporidian spores collected from the Ayu, Plecoglossus altivelis, fixed in 10% formalin. One group of spores were obtained from fry kept in salt water after artificial spawning and the other from adults cultured in fresh water. The spores collected were refixed with 2% KMnO4, dried in aceton series, evapolated with carbon and gold, and examined with SEM. The observations clearly demonstrated that the both groups of spores were the same in shape, size and surface structure, and identified as Glugea plecoglossi TAKAHASHI et EGUSA.
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  • 11 巻 (1976 - 1977) 3 号 p. e1
    公開日: 2009/10/26
    ジャーナル フリー
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