人体皮肤大草原与地球上任何一个生态系统一样奇异。现在,我们就来看看这个生态系统中的一些奇异而又恐怖的“居民”吧。人体皮肤生态系统中主要有三种类型的栖息地:油性的、干性的和湿润的。这些栖息地中的“居民”有真菌、病毒和白蚁,但最多的还是细菌。人体表面每平方厘米就有lO亿个细菌。先让我们来看双眉之间的区域(简称“眉间”或“印堂”)。对细菌来说,这是一个“油脂绿洲”。这里的一种主要细菌是痤疮乳酸杆菌,这种棒状细菌安家于发囊里,吃的是皮脂——由脂质分泌腺分泌的、有助于皮肤防水的蜡状油性物质。痤疮乳酸杆菌一度被认为是引起青春期红斑的罪魁祸首,但最近的研究表明实际情况并非如此。实际上,健康的发囊中只有一种细菌,而痤疮发炎的区域中有多种细菌。占据发囊的痤疮乳酸杆菌,事实上阻止了更多恶毒细菌的入侵。接着来看眉毛,它们的底部有白蚁在攀登。这些通常在夜间活动的八足恶魔是蜘蛛的近亲。人的面部生活 The human skin prairie is as bizarre as any of the ecosystems on Earth. Now, let’s take a look at some of the bizarre and terrifying “inhabitants” in this ecosystem. There are three main types of habitats in the human skin ecosystem: oily, dry and moist. The “inhabitants” in these habitats have fungi, viruses and termites, but most are bacteria. There are 10 million bacteria per square centimeter of human body surface. Let us first look at the area between the two eyebrows (referred to as “eyebrows ” or “Yintang ”). For bacteria, this is a “grease oasis”. One of the major bacteria here is Lactobacillus acne, a coryneform bacterium that lives in the hair follicles and sebum - a waxy, oily substance secreted by the lipid glands that helps the skin to watertight. Lactobacillus acne was once considered the culprit responsible for adolescent erythema, but recent studies show that this is not the case. In fact, there is only one type of bacteria in a healthy hair follicle, and many bacteria in the area where acne is inflamed. Occurring in the hair follicles of Acne Lactobacillus, in fact, prevented the invasion of more virulent bacteria. Then look at the eyebrows, there are termites at the bottom of their climb. These eight-footed devils, usually at night, are close relatives of spiders. Human face life