Monitoring the bacteria flushed into the sewer system of a town, for instance, might reveal a lot about the entire town’s health. But a regulation requiring permission from every resident of the town would stop the study dead in its tracks
Personally I think none of us own our microbes – since we get them from the world around us and likely share them with millions of others. It would be akin to saying we own genes found in all humans. But there very well may be some person specific alleles in microbes that could in a way be akin to person specific cell lines. Not sure.