I think I am going to do work on Carcinogenic bacteria.

Sources listed below:

doi:10.3748/wjg.v16.i43.5395

https://doi.org/10.1186/1750-9378-9-31

https://doi.org/10.1016/j.arcmed.2017.11.008

https://doi.org/10.1016/j.canlet.2017.11.036

http://dx.doi.org/10.1016/j.smim.2017.08.001