While the vast amount of attention is given to the bad kinds because of their potential for creating illness, humans share a necessary symbiotic relationship with many types of helpful bacteria. The NHGRI Division of Extramural Research supports grants for research and training and career development at sites nationwide. @SZapper - Staph bacteria is pretty disturbing, but there's really nothing you can do about it, save cleaning yourself with antibacterial soap from head to toe. A high-resolution image of the bacterium, Enterococcus faecalis, one of many commensal microbes that live in the human gut, is available in color at www.genome.gov/pressDisplay.cfm?photoID=20023, or in black and white at www.genome.gov/pressDisplay.cfm?photoID=20024. The bacteria is supposed to be good for you digestive system, but it's also good for vaginal health. Some are crucial to our very survival. In the healthy gut, for example, there will always be a population of bacteria needed to help digest fats, but it may not always be the same bacterial species carrying out this job. Mesophiles, or mesophilic bacteria, are the bacteria responsible for most human infections. Human decomposition is a natural process involving the breakdown of tissues after death. Humans generally have between 2 and 5 pounds (1.0 to 2.26 kg) of bacteria in their bodies. We acquire these bacteria during birth and the first years of life, and they live with us throughout our lives. Common Fund programs are designed to overcome major research barriers and pursue emerging opportunities for the benefit of the biomedical research community at large. A single mouth can be home to more than 6 billion bacteria, an impressive number when compared to 7.3 billion total human population of earth. The NIH Common Fund also invested in a series of studies to evaluate the ethical, legal and social implications of microbiome research. Bacteria can be harmful, but some species of bacteria are needed to keep us healthy. Complicating matters, scientists report that at least 50% of these strains cannot be grown in a lab because of the difficulty in creating a suitable environment that simulates the human gut. Bacteria, 90 trillion. But add all the genes in our microbiome together and the figure … Because of their small size, however, microorganisms make up only about 1 to 3 percent of the body's mass (in a 200-pound adult, that’s 2 to 6 pounds of bacteria), but play a vital role in human health. Average Human height is between 5 feet to 6 feet tall. Good bacteria in the body. One of the problems with treatment through probiotics is that bacteria within us are not well understood. Fevers are part of the body's defense against pathogenic viruses, so rapid tests for viral load may help children avoid inappropriate treatment with antibiotics that do not kill the viruses but may harm the child's healthy microbiome. While the results of these studies are yet to be published, a number of important issues already have been identified, ranging from how products designed to manipulate the microbiome — such as probiotic concoctions that include live microorganism believed to benefit the body — might be regulated, to whether individuals should begin to consider storing their microbiome while healthy. Also, the microbiome can vary from one ovary to the other. HHMI reports that the largest concentration of bacteria in the human body is found in the intestines. Apparently, adding a little bacteria to my body wasn't harmful at all. “Microbes in the gut break down many of the proteins, lipids and carbohydrates in our diet into nutrients that we can then absorb. Male reproductive tract. For example, researchers at the Baylor College of Medicine in Houston compared changes in the vaginal microbiome of 24 pregnant women with 60 women who were not pregnant and found that the vaginal microbiome undergoes a dramatic shift in bacterial species in preparation for birth, principally characterized by decreased species diversity. However, the medical community believes a replacement is exactly what’s needed. Genome sequencing creates first reference data for microbes living with healthy adults. As a part of HMP, NIH funded a number of studies to look for associations of the microbiome with diseases and several PLoS papers include medical results. The relationship between the different strains of bacteria and the human body is a dynamic one, constantly adjusting to changing conditions. Average human weight is between 100 pounds to 200 pounds. Additional information about NHGRI can be found at its website, www.genome.gov. 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