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谈到“健康”一词，人们自然而然就会联想到疾病，从医疗卫生角度讲，预防有害细菌对人体的侵害，是促进健康的一种有效途径。有害细菌在自然界分布非常广泛，无论是土壤、空气、水，还是各类物体表面、人体的体表以及与外界相通的体腔，它们无处不在，巳种类繁多，数量庞大，
When it comes to the word “health”, people naturally think of the disease. From a medical and health perspective, preventing harmful bacteria from affecting the human body is an effective way to promote health. Harmful bacteria are widely distributed in nature, whether it is soil, air, water, or the surface of various objects, body surface and the body cavity communicating with the outside world, they are ubiquitous, have a wide range of large quantities,