Prevalence of Clostridium botulinum type E and coexistence of C. botulinum nonproteolytic type B in the river soil of Japan. |
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Authors: | K Yamakawa S Nakamura |
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Institution: | Department of Bacteriology, School of Medicine, Kanazawa University, Ishikawa, Japan. |
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Abstract: | Soil samples from 98 sites in the whole systems of four rivers in Japan were examined for the presence of Clostridium botulinum. Type E organism was prevalently shown throughout the whole river systems including upper part; detection rates of type E toxin in soil culture ranged from 33 to 82%. This type was also detected in soil of adjacent mountainous district. Type B and C toxins were detected at 7% and 9% of the sites examined, respectively. C. botulinum type E and nonproteolytic type B strains were isolated from enrichment cultures of soil samples. These results suggest that the terrestrial origin of type E organism would be considered as one of the reasons for the high incidence of this organism in the sea areas, and prove that C. botulinum nonproteolytic type B exists in the soil of Japan. |
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