Fecal Microbiota Transplant (FMT)

A fecal transplant is usually done to treat an infection by balancing good and bad bacteria in your colon.

The colon normally contains a mix of bacteria. Some of the mix is good bacteria that keep the colon healthy. They don't cause disease. But when you take an antibiotic to kill bad bacteria, the medicine may also kill the good bacteria. Without the good bacteria, bad bacteria like Clostridioides difficile (also called C. diff) can cause serious illness. C. diff can cause diarrhea, fever, and belly cramps.

First, stool from a donor will be saved and then processed for the transplant. It will be mixed with a liquid. Processed stool may also be bought from a medical supplier.

Before the transplant, your doctor may ask you to do some things to prepare. You may need to go on a liquid diet. You may be asked to stop taking certain medicines. Your doctor may also have you take a laxative or other medicine to empty your colon.

The transplant is done in a doctor's office, a clinic, or a hospital. You may get medicine to help you relax.

The transplant itself may be done with a colonoscopy. In this procedure, the doctor moves a thin, lighted tube through the colon. As the tube is removed, the stool is put in the colon. Other methods, like a nasal tube or an enema, might be used to place the stool.

After the transplant, you may have some discomfort, such as cramps or bloating. These symptoms should go away on their own. Let your doctor know if they last or get worse. There's also a small chance of getting a new infection from the donor stool.