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  • Gastrointestinal Providers

  • Degli Esposti, Silvia

    Silvia Degli Esposti, MD, is director of the Center for Women’s Gastrointestinal Medicine at the Women’s Medicine Collaborative. She is an associate professor of medicine (clinical) at The Warren Alpert Medical School of Brown University and director of the fellowship pathway in women’s gastrointestinal diseases at Alpert Medical School. Degli Esposti graduated summa cum laude from the University of Bologna Medical School in Bologna, Italy. She completed her residency and fellowship at Brown University. She is a national expert in gastrointestinal and liver disease in pregnancy. She is the author of many chapters and original articles and has won several awards. 

    Degli Esposti is a pioneer in the field of women’s health in gastroenterology and works at a national level to develop programs addressing the needs of women. She also has been active in the Rhode Island community as an advocate for women’s health. She leads the Rhode Island Department of Health Perinatal Hepatitis Prevention Program, an award-winning program caring for pregnant women with viral hepatitis and their children. She was director of the Division of Gastroenterology and the Gastrointestinal Disorders in Pregnancy Clinic at Women & Infants Hospital before moving to the Women’s Medicine Collaborative. 

    Degli Esposti is board certified in internal medicine and gastroenterology. Her clinical and research interests include liver disease and gastrointestinal diseases in women. She is currently leading several studies in inflammatory bowel disease and hepatitis in pregnancy. Degli Esposti is fluent in English and Italian.


    Kelly, Colleen

    Colleen R. Kelly, MD, FACG, is a gastroenterologist in the Center for Women’s Gastrointestinal Medicine at the Women’s Medicine Collaborative. She is an assistant professor of medicine at The Warren Alpert Medical School of Brown University and a faculty member in the fellowship pathway in women’s gastrointestinal diseases at Alpert Medical School. 

    She received a medical degree from Ohio State University in Columbus, Ohio, completed a residency in internal medicine at Boston Medical Center, and completed a fellowship in gastroenterology at Alpert Medical School. She is a fellow of the American College of Gastroenterology. Kelly has been an active participant in the Rhode Island Pelvic Floor Network and led the irritable bowel syndrome and motility effort at Women & Infants Hospital before moving to the Women’s Medicine Collaborative. 

    She is nationally recognized in the field of gut flora and its implication in recurrent C. difficile infection. The focus of her research and clinical practice is fecal microbiota transplant (FMT) and she has assisted many physicians and institutions in developing FMT protocols. Kelly has authored a number of papers and abstracts on the subject and was a member of a working group that drafted a best-practices article for treating C. difficile infection with FMT, published in 2011. 

    She is a principal investigator for the first US clinical trial of FMT to treat relapsing C. difficile infection, funded by the National Institutes of Health (NIDDK). She is on the board of advisors of The Fecal Transplant Foundation. Kelly is board certified in gastroenterology. Her clinical interests include fecal transplantation, C. difficile, chronic diarrhea and other gastrointestinal motility disorders common in women, such as constipation and irritable bowel syndrome.


    Pressman, Amanda

    Amanda Pressman, MD, is a gastroenterologist in the Center for Women’s Gastrointestinal Medicine at the Women’s Medicine Collaborative and at the Gastroesophageal and Rectal Motility laboratory at Lifespan. In addition, she is director of the Program for Pelvic Floor Disorders at the Women’s Medicine Collaborative.  

    She is an assistant professor of medicine at The Warren Alpert Medical School of Brown University and a faculty member in the fellowship pathway in women’s gastrointestinal diseases at Alpert Medical School. She received a medical degree from Case Western Reserve University School of Medicine in Cleveland, Ohio, and completed a residency at Harvard Medical School.  

    She is a graduate of the gastroenterology fellowship at Alpert Medical School. During her fellowship she received the prestigious Virology Fellowship Award from Bristol Myers Squibb and the Joe DiMase Award for her research on colorectal cancer screening. Pressman is one of the initial founders of Screening Colonoscopies for Underserved Persons (SCUP), a program offering colorectal cancer screening to the indigent population in Rhode Island.  

    She has published original research articles and chapters in the field of women’s health. Pressman is board certified in internal medicine and gastroenterology. She is the 2013 recipient of the Teacher of the Year Award in the Brown University Affiliated Hospital GI Training Program. Her clinical and research interests are gastroesophageal motility disorders, including pelvic floor disorders, gastroparesis and excessive nausea and vomiting in pregnancy, and colorectal cancer screening in women. 


    WMC Roth LeslieLeslie Roth, MD, FACS, FASCRS, is a colorectal surgeon in the Program for Pelvic Floor Disorders in the Center for Women’s Gastrointestinal Medicine at the Women’s Medicine Collaborative. An assistant professor of surgery at The Warren Alpert Medical School of Brown University, Roth received her undergraduate degree from the University of Arizona and her medical degree from the Tel Aviv University Sackler School of Medicine, New York State/American Program, in Ramat Aviv, Israel and New York. 

    She completed her residency at Penn State Milton S. Hershey Medical Center. She is a graduate of the colon and rectal surgery fellowship at the University of Louisville in Kentucky. Roth is board certified in both general and colorectal surgery. She is also a fellow of both The American College of Surgeons and The American Society of Colon and Rectal Surgeons. 

    Her areas of clinical interest and expertise include colon and rectal cancer surgery, colonoscopy, laparoscopic/minimally invasive surgery, benign anorectal conditions, fecal incontinence and other pelvic floor disorders.


    Sara Wriston, MSN, FNP-BC, is a nurse practitioner in the Center for Women’s Gastrointestinal Medicine at the Women’s Medicine Collaborative. She received an undergraduate degree from the University of Michigan in Ann Arbor, Michigan and a graduate degree from the University of Pennsylvania in Philadelphia, Pennsylvania.  

    As well as gastroenterology, she has extensive experience in internal medicine, obstetrics and gynecology, and oncology. Wriston has been an important collaborator in the Perinatal Hepatitis Prevention Program and was responsible, along with Silvia Degli Esposti, MD, for the evaluation and treatment of patients with viral hepatitis at Women & Infants Hospital before moving to the Women’s Medicine Collaborative. Wriston is a board certified family nurse practitioner. Her clinical and research interests include liver disease, particularly hepatitis, and gastrointestinal problems in pregnancy.