摘要:A lot of sterilized disinfectants have been used in hospitals, recently. Pharmaceutical companies producing them only assure their sterility before unsealing the containers. Therefore, we examined the microbiological quality of both commercially available sterilized and prepared disinfectants inside two hospitals in Osaka. We investigated bacterial contamination in sterile purified water under opening for two or seventeen h in one of the hospitals. The isolated bacteria from the water after opening their caps were classified into sixteen strains : twelve Gram positive coccus, two Gram positive bacilli and two Gram negative bacilli. However, no bacteria were found in four kinds of the disinfectants, 0.025% Zalkonin[○!R], 0.025% Hyamine[○!R] 0.05% Stericlon[○!R] and 0.05% Hibitane[○!R] after opening caps of containers for five or thirty min in the hospitals. These results suggested that harmful bacterial effects might not be found in several opening caps of disinfectant containers.