henry copeland:

Microbiota-Nourishing Immunity: A Guide to Understanding Our Microbial Self - ScienceDirect

Here we discuss the concept of microbiota-nourishing immunity, a host-microbe chimera composed of the microbiota and host factors that shape the microbial ecosystem, which functions in conferring colonization resistance against pathogens. We propose that dysbiosis is a biomarker of a weakening in microbiota-nourishing immunity and that homeostasis can be defined as a state of immune competence.
- www.sciencedirect.com