The majority of epithelial surfaces of our body, such as the skin and mucosa, as well as our digestive tract are colonized by a vast number of microorganisms. The microbiota comprises bacteria, archaea, fungi, protozoans, and viruses. The microbiota, mainly intestinal microbiota influence in human health and disease. They are helpful in physiologic activities, such as digestion, metabolism, synthesis of vitamins. Their metabolic products stimulate...