This intelligent bacterial ecosystem in your gut makes up the majority of your immune system, and your body actually contains 10 times more bacterial cells than human cells! (mindbodygreen.com)
For a long time human milk was considered sterile; however, subsequent studies have shown that it contains a complex bacterial ecosystem. (ilactation.com)
This is important because our health is greatly determined by bacterial ecosystems like those in the gut or on the skin. (sciencedaily.com)