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The microbiome is defined as a characteristic microbial community occupying a reasonable well-defined habitat which has distinct physio-chemical properties. The microbiome not only refers to the microorganisms involved but also encompass their theatre of activity, which results in the formation of specific ecological niches.
The microbiome and host emerged during evolution as a synergistic unit from epigenetics and genetic characteristics, sometimes collectively referred to as a holobiont. [ 7 ] [ 8 ] The presence of microbiota in human and other metazoan guts has been critical for understanding the co-evolution between metazoans and bacteria.
In 2014, the Earth Microbiome project proposed a broad initiative to identify the diversity and importance of the microbiota in different ecosystems across the planet, including free-living microbiota (in water and terrestrial systems) and host associated-microbiota (associated with plants and animals).
Graphic depicting the human skin microbiota, with relative prevalences of various classes of bacteria. The human microbiome is the aggregate of all microbiota that reside on or within human tissues and biofluids along with the corresponding anatomical sites in which they reside, [1] [2] including the gastrointestinal tract, skin, mammary glands, seminal fluid, uterus, ovarian follicles, lung ...
The microbiome is dynamic: it varies between individuals, over time, and can influenced by both endogenous and exogenous forces. [ 2 ] Abundant research in invertebrates [ 3 ] [ 4 ] [ 5 ] has shown that endosymbionts may be transmitted vertically to oocytes or externally transmitted during oviposition. [ 6 ]
The Human Microbiome Project (HMP) was a United States National Institutes of Health (NIH) research initiative to improve understanding of the microbiota involved in human health and disease. Launched in 2007, [ 1 ] the first phase (HMP1) focused on identifying and characterizing human microbiota.
Microbiome research refers to the studying of microorganisms' interaction within and outside of the host. Common microorganisms include different types of fungi, bacteria, and viruses, and the community of microorganisms is known as the microbiome. These microorganisms exist in most of our body parts, contributing to our health. [20]
A microbiome-wide association study (MWAS), otherwise known as a metagenome-wide association study (MGWAS), is a statistical methodology used to examine the full metagenome of a defined microbiome in various organisms to determine if some feature (as example, gene or species) of the microbiome is associated with a host trait.