Chiara Maddison In the article “The Ultimate Social Network,” the author, Jennifer Ackerman, writes about the human microbiome. She explains the research on this and on two specific bacteria, Bacteroides Thetaiotaomicron and Helicobacter Pylori. She also talks about how these microorganisms survive in the human body. The author starts by explaining the human microbiome and the research on it. For many years, biologists thought that the human body was able to perform all of its important functions by itself. However, in the past decade, they have found that the human body contains trillions of microorganisms that help with these important processes. In fact, they outnumber human cell 10 to one. At first, microbe research was only focused on harmful pathogens, but recently, biologists have figured out what the most common bacteria in the human body are, and have been trying to figure out the specific functions of theses microorganisms. Researching these has been very difficult for scientists. For example, many of the bacterial cells in the intestines can’t survive in petri dishes, so researchers have had to find other ways to examine them. They have done this by studying the strands of DNA and RNA in these cells, instead of the whole cell. Researchers have found that no two people have the same …show more content…
Researchers have also been trying to figure out how these microorganisms survive in the human body. To fight harmful bacteria, the immune system creates T cells. The body also creates regulatory T cells, which prevent the T cells from attack the body’s own cells. A bacteria called Bacteroides Fragilis helps to boost the production of regulatory T cells. In the 1990s, scientists found that one of the sugar molecules on the surface of B. Fragilis, called polysaccharide A, signals the immune system to create regulatory T cells. This also protects the bacteria from, the other T