Growing evidence for the effectiveness of fecal microbiota transplants as a treatment for patients with recurrent bouts of Clostridium difficile (C.difficile) associated diarrhea is presented in three studies -- including a long-term follow-up of colonoscopic fecal microbiota transplant (FMT) for recurrent C. difficile Infection that included 77 patients from five different states -- unveiled at the American College of Gastroenterology's (ACG) 76th Annual Scientific meeting in Washington, DC.
In a fourth study, investigators from the Centre for Digestive Diseases in Australia explored fecal bacterial transplantation as a treatment for Inflammatory Bowel Disease. While this is a new area of research, results of this study show success in treating IBD when the fecal transplant is done recurrently.
The first study, "Long-term Follow-up of Colonoscopic Fecal Microbiota Transplant (FMT) for Recurrent C. difficile Infection (RCDI)," included 77 patients from five different states (RI, NY, OK, CA,WA) who previously had a colonoscopic fecal microbiota transplant at least three months ago for recurrent C. difficile infection, and found that FMT was successful in 70 out of 77 patients (91 percent) who were on average elderly, debilitated and had undergone multiple failed treatments, including antibiotic and probiotic therapies. Additionally, in six of the remaining seven patients, a single two-week course of vancomycin or a two-week vancomycin course plus one further FMT resulted in cure (98 percent).
"Many of these patients we followed up with had been ill for a long time, but once they underwent the fecal microbiota transplant their response to the treatment was quick and their symptoms improved on average in about six days," said investigator Mark H. Mellow, MD, FACG, of INTERGRIS Baptist Medical Center in Oklahoma. The average duration of illness for these patients was 11 months, but after the procedure patients continued to improve and --without subsequent antibiotic treatment--did not have a recurrence of C. difficile infection during follow-up (on average , 17 months), according to Dr. Mellow and his team of co-investigators which included a leading pioneer of fecal microbiota transplantation, Lawrence J. Brandt, MD, MACG, of the Albert Einstein College of Medicine in New York.
Results from a meta-analysis by researchers at the University of Toledo Medical Center were also unveiled, providing further evidence of the effectiveness of fecal microbiota transplantation. "Fecal Bacteriotherapy Works for Clostridium difficile Infection -A Meta-Analysis," reviewed the cases of 148 patients who had received fecal transplants for C. difficile infection. Follow-up ranged from 10 days to 62 months after the transplant, with an average follow-up of 1 year. Fecal transplant had an overall success rate of 85.4 percent, according to researchers, who also concluded that the procedure was a safe and effective treatment option for C. difficile infection.
Clostridium difficile is a bacterium that causes infection leading to diarrhea and is most often related to antibiotic use during medical treatment. A major cause of morbidity and increasing health care costs among hospitalized patients, C. difficile infections have dramatically increased in recent years, with 500,000 cases in the United States annually and approximately 15,000 deaths each year, according to the U.S. Centers for Disease Control & Prevention. Up to 25 percent of patients will have a recurrence of C. difficile infection, and a proportion will be refractory to antibiotics. C. difficile is especially dangerous for patients with weakened immune systems such as the elderly and those with Inflammatory Bowel Disease (IBD). Therapies for this difficult-to-treat subpopulation include antibiotics, probiotics, toxin-binding medications, active vaccination, intravenous immunoglobon, and fecal microbiota transplant, for which the evidence has been mounting as an effective rescue for recurrent and refractory cases of C. difficile associated diarrhea.
"While the concept of fecal transplantation may sound unpleasant to some, patient acceptance of this treatment is growing, especially when they have been suffering for months with recurrent C. difficile," said Dr. Mellow. "When we asked patients in our study about their choice of treatment if their infection recurred, 53 percent said fecal transplant would be their first choice for treatment."
In a related study also unveiled at the ACG meeting, "Clostridium difficile Infection in Ulcerative Colitis: Increased Risk of Colectomy and Postoperative Infectious Complications," researchers from the University of Calgary found that patients with ulcerative colitis who were diagnosed with C. difficile were significantly less likely to respond to medical treatment and as a result require a colectomy when they diagnosed with C. difficile in the hospital or within 90 days of admission. In addition, patients with ulcerative colitis who had concomitant C. difficile, preoperatively were at a higher risk of infectious complications following a colectomy.
Researchers Find Fecal Microbiota Transplantation Effective For Treatment of IBD
With the growing success of fecal transplantation for C.Difficile, researchers have started to explore the effectiveness of this procedure for other serious conditions, such as Inflammatory Bowel Disease (IBD). A second study, "Reversal of Inflammatory Bowel Disease (IBD) with Recurrent Fecal Microbiota Transplants (FMT)," reports successful treatment of severe mixed IBD using recurrent fecal microbiota transplants in three patient cases.
FMT may act as an antagonist to etiological infective agent(s) and aid in re-establishing depleted bacterial species, thereby reversing IBD, according to researchers from the Centre for Digestive Diseases in Australia.
Commenting on the cases of FMT in IBD, lead researcher Thomas Borody, MD, PhD, FACG, said, "the rapid response of FMT and lack of adverse effects make FMT a viable option for treatment-refractory patients and is certainly an added option for those facing colectomy."
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