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  • Title: [Survival of Vibrio cholerae O139 Synonym Bengal in water from a river].
    Author: Okitsu T, Morozumi H, Murase T, Suzuki R, Matsushima A, Yamai S.
    Journal: Kansenshogaku Zasshi; 1994 Jun; 68(6):744-50. PubMed ID: 8051441.
    Abstract:
    Survival of five strains of Vibrio cholerae, including serotypes O139 Synonym Bengal, O1 El Tor, and non-O1 were compared in water from a river. These bacteria were mixed with water from a river and the water filtered through 0.45 micron millipore filters, respectively, to yield a concentration of 10(6) CFU/ml and incubated at 5 degrees C and 20 degrees C for 21 days. The survival curve of V. cholerae O139 was almost the same with V. cholerae O1 and non-O1. The number of these bacilli decreased to less than 10(2) CFU/ml at 7 days of the incubation at 20 degrees C. When incubated at 5 degrees, however, these bacilli survived much longer and the number decreased to the same value after 14 days. Therefore, these results indicated that the temperature during the incubation greatly affects the survival of V. cholerae. On the other hand, when the water was filtered and used for the experiment, V. cholerae survived longer than in the polluted water. From these observations, if the river is polluted with V. cholerae O139 in the future, it is suggested that the distribution of V. cholerae O139 in the river may be the same as the present condition with V. cholerae O1 and non-O1.
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