Our gut hosts a diverse community of trillions of microorganisms, which live in symbiosis with our bodies. Many of them play a critical role to our overall health. And as much as we need these bacteria to stay healthy, we also need to keep this balance intact. By safeguarding our microbial community the symbiotic nature of our relationship is upheld.
Our immune system makes sure that we keep the perfect balance between a tolerated load of microorganisms in our bodies and that we are able to respond actively to invasive pathogens.
The following article appeared in Nature Immunology and discusses the important role of the immune system regarding to the complex interactions between microbes in the gut and their host, the human body.