colon cleanse
I had c. diff, 3 trips to the ER with critically low potassium. 3 rounds of treatment, during which I discovered that Vancomycin had been bought by a different company & a course of treatment went from about $200 to $1200. Even with probiotics & yoghurt it cam back. Dr. finally did another round of Flagyl, & halfway through did a colon cleanse similar to colonoscopy prep. Reasoning was that 'let's clean it all out & see what grows back'.
It worked. By that time a fecal transplant would have been OK with me. If you've never been that sick you can't know what you'd do to get better.