bacteriotherapy

noun

bac·​te·​ri·​o·​ther·​a·​py bak-ˌtir-ē-ō-ˈther-ə-pē 

plural bacteriotherapies

: the treatment of disease by the use of bacteria or their products

After many months of return infections and thousands of dollars spent on antibiotics, some doctors are suggesting a bizarre-sounding treatment—replacing the missing good bacteria by transplanting the stool of a healthy spouse or relative, sometimes known as bacteriotherapy.

—Don Finley, The San Antonio Express-News

bacteriotherapeutic

-ˌther-ə-ˈpyüt-ik 

adjective