Bacteria such as salmonella use a layer of biofilm to attach themselves to surfaces such as skin, medical devices, tissues, etc. Scientists at Israel’s Technion Institute used Alzheimer’s treatments to disrupt the biofilms. The salmonella virus couldn’t stick to the surfaces and became much less aggressive.

https://www.timesofisrael.com/researchers-tackle-biofilm-to-make-salmonella-infection-less-aggressive/