[DoodleBuggy]

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...

http://time.com/4631305/appendicitis-appendix-gut-bacteria/