Although there have been a number of clinical reports on preoperative hand disinfection, a very few evaluation tests for efficacy of general hand washing in hospital have been made, hence resulting in few reports on this subject. Comparative test of sterilizing ability were carried out with Hibiscrub, a preoperative hand disinfectant, and Osvan and Phisohex, diluted disinfectants in basin. The method. used for these tests is Price's continuous basin method which is most reliable .in measuring

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... e reappearing number of resident bacteria on hands. Efficacy duration test was also studied for Hibiscrub. Hence, it was shown that Hibiscrub, compared with the other two disinfectants, has satisfactory efficacy for general hand washing in wards or examination rooms in short time (30 sec) and in small amount (20 ml).