re: "...this is what my sister in law has got and what they plan on doing about it.
Fecal (faecal) microbiota transplantation (FMT) is the process of transplantation of fecal flora from a healthy individual into a recipient[1][2] as a treatment for patients suffering from Clostridium difficile infection (CDI), which produces effects ranging from diarrhea to pseudomembranous colitis."
I'm quite familiar with C. diff, ribit. My sister contracted it three years ago. She nearly died. In fact, once she was out of danger, doctors told her they hadn't ever seen such a severe case where the patient lived.
As I understand it, C. diff is in the body naturally. When patients are given certain antibiotics, most of the intestinal bacteria die... leaving a void for the resistant C. diff to fill. So C. diff overpopulates the intestines and starts doing harm.
My sister went into the hospital due to an allergic reaction to B.P. medication that made her esophagus close. They intubated, but she contracted pneumonia while the tube was in her. Antibiotics were used and . . . it was the C. diff that came closest to killing her.
She was sedated... virtually unconscious... for SEVEN weeks. She still has a serious bacterial imbalance today. They've told her that she always will.
I hope your sister's case is less severe. Among older patients, the mortality rate is close to 25 percent.