This question has been answered many times through numerous studies since 2001
TLDR: Yes
http://www.sciencedirect.com/science/article/pii/S1631068316...
http://dujs.dartmouth.edu/2008/04/a-bacterial-safe-house-a-n...
https://www.sciencedaily.com/releases/2007/10/071008102334.h...