Bacteria in the Restroom - Pondering Succession and Stability

Did you ever wonder about the bacteria on the surfaces in the restroom?  Well, you probably figured there were bacteria there (and thus you use your foot to flush the commode), but hopefully you pondered deeper thoughts rather than postulating bacterial succession on the floor as well as the seat in which you sit.

Well some did ponder such questions, completed a study and published those results (Ecological Succession and Viability of Human-Associated Microbiota on Restroom Surfaces).  They showed that the ecological succession of bacterial populations does occur and that in general, a stable community does occur after 8 hours, and is made up of skin and environmental organisms rather than gut microorganisms.

"The prevalence of skin-associated, rather than feces-associated taxa, in the late-successional community suggests that organisms are selected for their ability to persist in a dry, aerobic environment, which is a very different environment from the gut. Human-associated microbiota, including Staphylococcus strains, can remain viable on BE surfaces for many hours after their dispersal [cleaning] agents are removed. This suggests that common BE surfaces may be significant fomites for viable human pathogens."