Distribution of Vibrio parahaemolyticus in Chesapeake Bay during the Summer Season

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Abstract
The distribution ofVibrio parahaemolyticus in Chesapeake Bay during the warmer weather of the summer months was examined. This species was found throughout the Chesapeake Bay and its tributaries, even in areas of very low salinity. Counts of this species ranged from 0.04 per 100 ml to 46 per 100 ml in the water column and 2.03 to ≥2.4×103 per 100 cc of sediment. A variety of physical, chemical and bacteriological properties associated with the incidence and distribution ofV. parahaemolyticus were examined and salinity was found to be the major influence among the factors examined. Correlation and regression analysis showed that the population size of this species increased with increasing salinity in the estuary.

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