Diarrheal disease

This study tests a new vaccine called Shigella4V2 to see if it can protect people from shigellosis, a severe diarrheal disease. About 120 healthy adults will receive either the vaccine or a placebo and then be exposed to the bacteria in a controlled setting. The goal is to see if…

This study tests a two-dose vaccine designed to prevent diarrhea from two common types of Shigella bacteria in 8,000 children aged 6 months to 5 years in Bangladesh. Half the children get the vaccine, half get a placebo, and researchers track who gets sick over time. The goal is …

This study tests a drug called crofelemer in 6 children with microvillus inclusion disease (MVID), a rare condition causing severe diarrhea and dependence on IV fluids. The drug is given as a powder mixed with water, three times a day, and compared to a placebo. The goal is to se…

This study tests whether Water Safety Plans—a set of management steps to keep drinking water safe from source to tap—can improve water quality and reduce diarrhea in rural Ghana. About 4,500 people from communities served by private water suppliers will be involved. Researchers w…

This study tests whether a daily supplement called CMTS4520, which combines dietary fiber and probiotics, can help adults with chronic diarrhoea. One hundred participants will receive either the supplement or a placebo for four weeks. Researchers will track changes in stool frequ…

This study tests whether giving probiotics (Bacillus clausii) to critically ill adults can reduce serious infections like pneumonia and bloodstream infections. One hundred ICU patients will receive either the probiotic or a sugar pill, and researchers will track infection rates a…

This study offers voluntary screening for newborns in North Carolina to detect a wide range of rare health conditions early. Using a small blood sample already collected at birth, the program tests for dozens of disorders, including spinal muscular atrophy, cystic fibrosis, and m…

This study tests whether replacing dirt floors with concrete in rural Bangladeshi homes can reduce infections in children. About 800 pregnant women and their future babies will take part, with children checked for parasites and diarrhea up to age 2. If concrete floors lower infec…

This study tests whether a probiotic supplement called iVS-1, containing Bifidobacterium adolescentis, can reduce moderate to severe digestive symptoms like bloating, gas, and belly pain. About 92 adults will take either the probiotic or a placebo for 6 weeks and report their sym…

This study tests whether a probiotic called Bifidobacterium longum BBH016 can improve lower gut symptoms like abdominal pain, diarrhea, and bloating. 88 adults with these symptoms but no constipation will take either the probiotic or a placebo capsule twice daily for 8 weeks. Res…

This study tests whether fecal microbiota transplantation (FMT) – giving healthy donor stool in capsules – can safely reduce chronic diarrhea in people with systemic sclerosis. Twenty adults with scleroderma and persistent diarrhea will receive either FMT or a placebo. The main g…

This study tests whether a probiotic called Saccharomyces boulardii can help children aged 3 months to 5 years recover faster from bloody diarrhea. About 140 children will receive either the probiotic or a placebo, and researchers will track how long the bloody diarrhea lasts and…

This study looks at 200 people with ongoing stomach discomfort (functional dyspepsia) to find out how often they have small intestinal bacterial overgrowth (SIBO). Researchers will compare two methods—growing bacteria in a lab and DNA testing—to identify which germs are present. …

This study looks at whether using a UV light filter on private well water can lower the chance of stomach infections in children under 5. About 900 families in Pennsylvania and New Jersey will either get a working UV filter or a fake one. Researchers will track how often kids get…

This study looks at how diet, genetics, and gut bacteria work together to cause digestive problems like IBS, IBD, and celiac disease. Researchers will follow about 4,000 adults with and without these conditions to find patterns. The goal is to understand why some people get sick …

This study is a registry that will review medical records of 1,000 patients treated for benign or malignant gastrointestinal diseases between 2005 and 2030. Researchers will look at survival, symptoms like heartburn and swallowing trouble, and quality of life. The goal is to lear…

This observational study plans to enroll 120,000 people with various chronic diseases like pancreatitis, diabetes, and arthritis. Researchers will collect blood samples and health data to study how genetics and lifestyle affect disease progression. The goal is to find common dise…

This study follows 1,000 people with stomach pre-cancer conditions like chronic gastritis and intestinal metaplasia. Researchers will track disease progression over time and analyze biospecimens to find biomarkers linked to cancer development. The goal is to better understand who…