八丈島におけるくさや汁の成分と微生物相〔くさやに関する研究-3-〕

概要

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The chemical and microbiological analyses of kusaya gravy were determined in samples obtained from manufacturers at Hachijojima Island. The pH value (7.02-7.55), crude fat content (0.82-0.92%), the amount of total nitrogen (403-457mg/100ml), and the viable cell count on nutrient agar plate (3.4-9.4×107 cells/ml) did not differ significantly from those of Niijima and Oshima Islands. The NaCl concentration (8.0-11.1%), however, was much higher than those of Niijima and Oshima Islands. The classification of bacteria at the genus level was performed on 60 strains from the gravy of Hachijojima Island. The microbial flora was significantly different from those of Niijima and Oshima Islands: bacteria of genera Moraxella (38-65%) and Pseudomonas (15-57%) were the most predominant. Bacteria of genus Spirillum, which were the characteristic organisms in the gravy of Niijima and Oshima Islands, were also observed.
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