CLOSTRIDIA IN SOIL OF THE ANTARCTICA

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From the soil in the area around the Syowa Station, the East Ongul Island, the Antarctica, a total of 193 strains of clostridia were isolated and identified. It was surprising that the soil samples taken from the places which were considered to be scarcely contaminated by human beings and animals contained many clostridia.<BR>One hundred and fifty-five strains were assigned to 11 species, including C. perfringens, C. bifermentans, C. sordellii, C. sporogenes, C. plagarum, C. paraperfringens, C. septicum, C. tertium, C. cadaveris, C. butyricum and C. felsineum, but 38 strains remained unidentified. C. perfringens, C. bifermentans and C. sordelli were isolated very frequently and C. sporogenes less frequently.<BR>All the strains of C. sordellii were nonpathogenic and had almost the same characteristics as those of C. ifermentans except for the attitude in the urease test.<BR>The peculiar distribution and characteristics of the clostridia in the Antarctic soil were discussed in comparison with those found in the soil in Japan.

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