The human microbiome (or human microbiota) is the aggregate of microorganisms, a microbiome that resides on the surface and in deep layers of skin, in the saliva and oral mucosa, in the conjunctiva, and in the gastrointestinal tracts. They include bacteria, fungi, and archaea. Some of these organisms perform tasks that are useful for the human host. However, the majority have been too poorly researched for us to understand the role they play.

The number of normal bacterial cells that live on the body is in the region of 100 million. This number is 10 times greater than the 10 million cells that make up the human body.

Bakteri dapat ditemukan di dalam tubuh manusia, terutama di dalam saluran pencernaan. Jumlah total sel bakteri yang barada di dalam tubuh manusia bahkan lebih dari jumlah total sel tubuh manusia itu sendiri, yaitu lebih banyak sekitar 10 kali lipat.

kita tidak pernah sendirian, karena bersama kita berbagai mikroorganisme di tubuh kita, dan akan selalu ada