輸送中あるいは輸送後飼育中に起きる魚の斃死に関する細菌学的研究-II : 斃死魚から分離した病性V群菌の性状

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In the previous study1), numerous organisms were isolated from livers of red sea bream, Chrysophrys major, which had died during keeping after transportation, and the isolates were classified into thirteen groups on the basis of certain characteristics. Organisms belonging to group V and X showed pathogenicity in fish. The present paper deals with the characteristics and identification of the organisms belonging to group V. The results can be summarized as follows: 1) Vegetative cells are Vibrio-shaped rods having a single polar flagellum. Their size is about 1.5 microns in length and 0.7 microns in width. 2) The organisms grew well in the nutrient broth containing 1 to 5 percent sodium chloride. The optimal growth at a 3 percent NaCI level was observed in the temperature range 20° to 35°C and in the pH range 5 to 9. 3) The organisms were identified as Vibrio anguillarum like bacterium K-310, 11), based on their morphological and biochemical characteristics.
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