A Question on the Balance of Ecosystems on the Microbial Scale
Say that we had some living quarters on an Earth-like planet, within a moderately-sized base. The inhabitants of this base can freely roam the planet without environmental protection, and thus can bring back some less-than-pleasant microorganisms that like to group together then feed upon big sleeping things. As a result, before this base gets too large to keep proper tabs on all of its residents, the Powers that Be are investigating a sort of automated room-wide decontamination field.
This field would trigger at regular intervals, and absolutely kill everything in the room, with no regard to size or composition. Safety is paramount, but not the focus here -- what the Powers are investigating at the moment is how this might affect the microecology of these areas. Simply put, how would completely wiping a room of all microbial life once a day affect the bodies of those living in said room?
The Powers are aware that there are many beneficial microorganisms which we humans live in harmony with, such as those that help us digest. Would a regular wipe harm these, or other symbiotic microbes the Powers may be unaware of? To be clear, the residents would be nowhere near these rooms when the sweep occurs, so there would be no direct cleansing of a person's internals -- though it is suspected that sleeping in a clean room may upset some delicate balance, or throw off one's immune system.
Bonus points for explaining scalability. Perhaps a room means nothing in the grand scheme of things, since these humans will be out-and-about most of the time anyhow. But what if we did this to entire buildings -- might office workers start to suffer, spending all their time in massive clean zones?