Abstract
Pulsed lamps which irradiates ultraviolet(UV) in high luminance has been developed. The experiment to inactivate of cryptosporidium parvum was conducted with the pulsed lamp. Also the effect of inactivate to high turbidity solution was investigated.
The experiment examined the comparison and the evaluation methods (growth vitality assays and infectivity assays) with other kinds of UV lamps.
As a result, higher capability of the pulsed lamp was demonstrated in the high UV dose area, compared to other UV lamps. The difference between inactivation efficiencies by the low pressure mercury lamp, the medium pressure mercury lamp and the pulsed lamp was not significant in the effect of inactivate to high turbidity solution. However, the tailing phenomenon was not observed with the pulse lamp while it was with the low pressure mercury lamp and the medium pressure mercury lamp when evaluating by excystation method.
Moreover, sensitivity of cryptosporidium parvum to UV irradiation was in the order of the cell culture method, the mouse infection method, and excystation method in this experiment.
