Survival of Vibrio cholerae and Vibrio parahaemolyticus in natural waters of Yangon

ABSTRACT

Laboratory studies were conducted to examine the survival of V. cholerae and V. Parahaemolyticus in untreated and autoclaved samples of natural waters collected from different sources. Physico-chemical parameters of the natural waters were also examined as the turbidity, pH, hardness, dissolved solids, oxidizable organic matter, the chloride content, etc. The survival rates were found to very from 2 to 7 days for V. cholerae and from 30 minutes to 9 days for V. parahaemolyticus in raw natural waters. Both organisms survived for prolonged period in rever water that had been autoclaved.