Metagenome sequencing is a method of identifying microbial communities that exist in different environments. It is used primarily to analyse the distribution and types of bacteria and fungi. In other words, it is used to determine which microbial communities are present in a sample collected in a certain environment, and to identify their interactions and roles.
Moreover, the fusion primer is produced and experiments are conducted by mixing various samples, thus an analysis on archaea as well as bacteria can be performed. The number of genes in intestinal microorganisms is about 150 times greater than human genes. As the importance of the genome of microorganisms inhabiting the intestinal tract has recently gained attention, the metagenome is called the second genome.