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    Salinity-induced survival strategy of Vibrio cholerae associated with copepods in Cochin backwaters

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    Mar_Pollut_Bull_52_1425.pdf (329Kb)
    Date
    2006
    Author
    Thomas, K.U.
    Joseph, N.
    Raveendran, O.
    Nair, S.
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    Abstract
    The occurrence of Vibrio cholerae in water, sediment and copepods was studied over a wide range of salinity using conventional and polymerase chain reaction (PCR) techniques in the Cochin backwaters. V. cholerae occurred either as culturable or non-culturable form in this tropical estuary. During the pre monsoon period when high salinity prevailed (35.5 psu) V. cholerae was associated with copepods only in non-culturable form, but with the onset of monsoon when lower salinity prevailed, copepod-associated-V. cholerae reverted back to culturable form. The optimum salinity range for culturability was found to be 15-20 psu. This points to the fact that salinity is a major factor that which influences V. cholerae's culturability and its association with copepods in Cochin backwaters.
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    http://drs.nio.org/drs/handle/2264/813
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