Microbes are the dominant life form of Earth. Bacterial organisms living on our planet they outnumbered all others combined. Microbes dominate not only the planet, however, but also new people. Few know that the body of each of us is 10 times more microbial cells than the cells that compose the human body, and the number of microbial genes is 150 times than that of human genes. All these beings living in our body and its surface form an ecosystem that is called „microbiome” and symbiosis of these small beings with human cells creates a true „super-organism”.