コンブおよびその生育環境における好熱性放線菌の出現と分布

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Since the role of Thermoactinomyces vulgaris in the etiology of the so-called "Kombu asthma" breaking out among fishermen engaging in Kombu production was strongly suspected, its occurrence and distribution in the free environment of the fishing area of Hakodate city were studied. Mud, sand, soil, water, and Kombu (Laminaria japonica) were collected from sea shore, its tributary rivers, and from land areas around sea. The results are summerized as follows: 1) Thermoactinomyces sp. was detected in the surface of freshly harvested Kombu, in particular, was most abundant in parts of the blade infested with a kind of Bryozoa ("Kokemushi"), but was scarce in normal or some other parts infested with a kind of Hydrozoa ("Hige"). 2) All of 8 samples of sea water and 17 of 25 samples of sea sand showed the presence of Thermoactnomyces sp. spores, viable counts being 5-410 spores/l and 5-47 spores/g dry wt, respectively. 3) All of 14 samples of river water and 25 of 30 samples of river mud collected at different sampling stations on the four rivers had 3-1000 spores/l and 7-1800 spores/g dry wt, respectively. 4) All of 14 soil samples taken from the places of composts gave relatively high spore numbers of Thermoactinomyces sp.; 4 of the soil samples had as many as 106 spores/g dry wt and the remaining 10 samples had over 200 spores/g dry wt. Therefore, it appears that the major source of Thermoactinomyces sp. in the sea area where Kombu blades grow is the organisms being washed-in from the surrounding land areas.
日本水産學會の論文

コンブおよびその生育環境における好熱性放線菌の出現と分布

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