You probably have seen quite a bit in the media lately on the gut biome - how important good bacteria in our gut is for keeping healthy. You may not have read or heard much about the Urobiome - how good bacteria also helps keep things in balance in the bladder. Yes - the bladder is not a sterile environment!!!
You may find this interview with one of the top researchers around in this area a quick and interesting read:
Actually, I'm scared.
Tips for Long Road Trips with OAB/bladder issues ?
Young Adult with Incontinence