Abstract
Thirty four arsenic resistant bacterial strains were isolated from the soil samples of Khulna Shipyard. They were isolated by growing them on nutrient broth medium containing 5 mgl-1 of arsenic. From them, five strains were finally selected, and studied their morphological, biochemical and ecological characters in details. They were identified as Bacillus lichenifomis, Bacillus polymyxa, Listeria murrayi, Moraxella urethralis and Planococcus citreus. All of these strains were able to tolerate upto100 ppm (mgl-1) of arsenic (III). It is possibly due to the presence of arsenic (III) resistance mechanism(s) in these bacterial strains. The optimum pH and temperature for the growth of these bacterial strains were 8.5 and 37 °C, respectively.
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