BSC 283 Chapter Notes -Respiratory Tract, Commensalism, Microorganism
18 Oct 2022
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Document Summary
Everyone has microbes on skin and in the gut. More microorganism cells (bacteria, archaea, fungi, and viruses) in human body than human cells. Microbiota = predictable in almost every human. Microbiome= not predictable and unique to individuals. Define each and list most common portal of entry: mucous membrane, respiratory tract, gi tract, placenta, pendetallar. Hurts host but benefits the pathogen/parasite that invaded. We eat fiber and give out microbiome food and they release vitamins and other things that we need to be healthy. And they kill off other potentially harmful microorganisms that might want that food too. Microbiota/microbiome benefits but human host is unhurt/don"t benefit. Diseases that cause harm to host and have an infectious agent. Needs weakened immune system of host to cause infection/disease. Invasiveness is how well the disease spreads, if at all, to other body structures. Virulence is how strong the infectious agent is. Disease can be very invasive but not that virulent or vise versa.
