Methods Using ultraviolet ray plus formaldehyde, or using O 3 alone, air disinfections of aseptic things reserving room in supply department were done. The colony counting of air bacterial culture was compared after disinfections. 方法分别采用紫外线照射协同甲醛熏蒸与臭氧对供应室无菌物品存放间进行空气消毒,比较消毒后空气细菌培养的菌落数。