TMW 7.docx - TMW#7 Chapter 19 Why is the surface of the...

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TMW #7 Chapter 19 Why is the surface of the skin inhospitable for microbes? As sweat is produced by the skin and evaporates, salt covers the surface of the skin and sebum, an oily lipid that is secreted by sebaceous glands. The combination of these two acts as an microbial agent, preventing the growth of many microorganisms. Furthermore, the skin sheds the outer most layer taking any microbes with it. Why is the normal skin microbiome considered beneficial to a person? The normal skin microbiome acts as an antagonist against invading pathogens. They prevent other pathogens from staying on the outer layer of the skin and compete for resources, such as space and nutrients. Some of them produce chemicals that interfere with the growth of other microorganisms. Malassezia From the genus of fungi, this microorganism is typically found on the surface of the skin many animals, including humans. It is part of the regular microbiome of the human skin and is involved in digesting sebum.
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