Abstract
The microbial contamination of commercial purified water (J. P.) was studied. All of 8 samples examined were contaminated, especially with non-fermentative gram-negative rods and gave the bacterial counts of 50 to 100, 000/ ml. Organisms isolated from the purified water were highly susceptible to tetracyclines and aminoglycosides, but most of the isolates showed a resistance to β-lactam antibiotics and polymyxin B. The resistance of the isolates against heat and ultraviolet light was comparatively lower. These results reaffirmed that storage at 80° and ultraviolet radiation are very useful in controlling the bacterial contamination of purified water.
