The human microbiota is the name for all of the bacteria found within the human body. This aggregates of microorganisms are wide spread in different tissues, such as the skin, mammary glands, seminal fluid, uterus, saliva, oral mucosa, conjunctiva, gastrointestinal tracts.
Biotic homogenization is <span>the gradual replacement of regionally distinct ecological communities with cosmopolitan communities that reflect increasing global activity of humans</span>
