Human microbiome is the collective genomes of the microbes (composed of bacteria, bacteriophage, fungi, protozoa and viruses) that live inside and on the human body. Most of the microbes in the microbiome do not cause disease. Humans rely on microbes to perform many important functions that we cannot perform ourselves such as digesting food , synthesize vitamins, metabolize drugs, detoxifying carcinogens, stimulate renewal of cells in the gut lining and activate and support the immune system. In order to gain a better understanding of these interactions, we try to understand the taxonomic composition of the microbes in different conditions.