Clinical Research Directory

A Study to Evaluate the Effects of a Supplement on Gut Comfort in GLP-1 Receptor Agonist Users

This is a randomized, triple-blind, placebo-controlled, virtual clinical trial evaluating the effects of the Oxxynea® botanical supplement on gut comfort in adults who use GLP-1 receptor agonists (GLP-1 RAs). Seventy participants experiencing gastrointestinal discomfort associated with GLP-1 RA use will be randomized to receive either Oxxynea® or a matching placebo once daily for six weeks. Participants will complete questionnaires at Baseline, daily for the first 14 days, and at the end of Weeks 2, 4, and 6. The primary measure is change in gastrointestinal comfort assessed by the Gastrointestinal Quality of Life Index (GIQLI). Secondary measures include quality of life, participant-perceived product benefits, and specific GI symptom changes (nausea, abdominal pain, bloating, diarrhea, and constipation).

Effect of Water, Sanitation and Hygiene Educational Intervention on Incidence of Diarrhea and Childhood Stunting Among Under Five Children in Bule Hora Wereda, Southern Ethiopia

Background: Childhood malnutrition and diarrhea remains life-threatening, yet these conditions are preventable. Water, Sanitation, and Hygiene (WASH) interventions are among the most effective measures against diarrhea and stunting. Objective: To evaluate the effect of WASH education intervention on incidence of diarrhea and childhood stunting among under-five children in Southern Ethiopia. Methods: A Community based cluster randomized controlled trial was conducted in Bule Hora Woreda, West Guji Zone, Southern Ethiopia from November 1, 2024 - April 30, 2025. A total sample of 26 clusters (13 intervention groups and 13 control groups) were randomly selected and assigned to the intervention and control groups. Diarrhea incidence was measured through caregiver reporting of diarrheal episodes over 2 weeks for 6 month. Stunting was assessed using standardized anthropometry and calculated height-for-age Z-scores based on WHO growth standards. Generalized estimating equation with log link Poisson distribution family was used to assess the effect of intervention after adjusting for potential confounders.

A Study of Brenipatide (LY3537031) in Participants With Irritable Bowel Syndrome-Diarrhea (IBS-D)

The purpose of this study is to evaluate how well brenipatide (LY3537031) is tolerated, what side effects may occur, and the safety and efficacy in participants with Irritable Bowel Syndrome-Diarrhea (IBS-D). The study drug will be administered subcutaneously (SC) (under the skin) when compared with placebo. The study will last approximately 36 weeks.

Paternal Involvement in Nursing Guidance and Breastfeeding Self-Efficacy in Mothers of High-Risk Newborns

This study aims to evaluate whether a structured nursing guidance program that increases fathers' participation in the care of hospitalized high-risk newborns improves maternal outcomes compared with routine nursing care. Parents of high-risk newborns admitted to a neonatal intermediate care unit will be enrolled. Families in the control group will receive routine nursing education provided during hospitalization. Families in the intervention group will receive a structured nursing guidance program that includes step-by-step parent education, written educational materials, instructional videos, and active father participation in breastfeeding support and infant care. The study will compare the two groups on maternal breastfeeding self-efficacy, perceived spousal support, perceived nursing support, parental stress, breastfeeding-related anxiety, and breastfeeding practices at hospital discharge and one month after discharge. The findings may help develop family-centered nursing interventions that enhance paternal involvement and improve breastfeeding outcomes for families with high-risk newborns.

Fecal Microbiota Transplantation in Treating Immune-Checkpoint Inhibitor Induced-Diarrhea or Colitis in Genitourinary Cancer Patients

This trial studies how well fecal microbiota transplantation works in treating diarrhea or colitis (inflammation of the intestines) that is caused by certain types of medications (called immune-checkpoint inhibitors) in patients with genitourinary cancer. Fecal microbiota transplantation may effectively reduce the incidence of immune checkpoint inhibitor-induced diarrhea/colitis.

Impact Evaluation of Accelerating Climate-Resilient Water, Sanitation and Hygiene Services for Schools and Healthcare Facilities in Karamoja

Karamoja, in north-eastern Uganda, is among the most water-insecure regions in sub-Saharan Africa. Only 24 per cent of households can access the WHO-recommended 20 litres of water per person per day. Only 11.7 per cent have access to improved sanitation. A rapid vulnerability assessment covered all 182 operational primary schools in the sub-region between October and November 2025. It identified 53 schools as severely water insecure and a further 37 as moderately water insecure. Together, these schools serve an estimated 196,000 learners. The assessment also found that 89 schools lacked enough latrines to meet the national pupil-to-latrine ratio. Seventy-eight schools had no functional menstrual health management facilities. This study is a three-arm, phase-in cluster-randomised controlled trial. It evaluates the causal effects of a climate-resilient school WASH package on children's health and school attendance. It also examines adolescent girls' menstrual health self-efficacy. The study covers 60 primary schools that were found to be water-insecure across Karamoja's nine districts. The schools were stratified into three geographic zones. The researchers then used covariate-constrained randomisation to assign schools to three study arms. Phase 1 includes 30 schools receiving the intervention early. Phase 2 includes 20 schools receiving it later. The remaining 10 schools form the pure control group. The intervention combines climate-resilient WASH infrastructure with capacity-building and social and behaviour change activities. The infrastructure includes motorised boreholes, sex-disaggregated latrines and handwashing stations built to national standards. A subset of the boreholes will have data loggers for remote monitoring. The package also provides dedicated menstrual health facilities. These include enclosed changing areas and hygienic waste-disposal systems. Community water access points will be installed next to each school. Capacity-building activities will involve School Management Committees, Parent-Teacher Associations, teachers, District Water Officers and School Health Clubs. Data will be collected through three repeated cross-sectional rounds. The baseline will take place in the fourth quarter of 2026. The midline will take place in the first quarter of 2028, and the endline in the first quarter of 2030. Seven instruments will be used. These include pupil and matched caregiver surveys, school WASH facility and classroom roll-call observations, and head teacher and teacher surveys. The study will also digitise school enrolment, attendance and examination records. Community leaders will be interviewed separately. In each round, the sample will include 20 post-menarche girls and 20 general pupils per school. The study will interview one caregiver for each sampled pupil. The study will also interview six teachers, the head teacher and four community leaders in each school catchment. The study has three co-primary outcomes. The first is the pupil absence rate, measured using digitised attendance registers. The second is the seven-day prevalence of diarrhoea among pupils. The third is menstrual health self-efficacy among post-menarche girls. We will measure this using the 26-item Self-Efficacy in Addressing Menstrual Needs Scale (SAMNS-26). The primary analysis will estimate the intent-to-treat effect of assignment to Phase 1. At midline, Phase 1 schools will be compared with Phase 2 and pure control schools. We will conduct two comparisons at endline. First, we will compare all treated schools with the pure control group. Second, Phase 1 schools will be compared with Phase 2 schools to test whether effects differ by exposure duration.

Validation of a CDSA Strategy to Reduce Antibiotic Prescription in Senegal

This trial aims to validate a novel clinical care strategy based on a electronic clinical decision support algorithm (CDSA) combined with point of care rapid diagnostic tests by evaluating its impact on antibiotic prescription and clinical outcome of children and adolescent presenting at primary healthcare facilities with non-severe acute illness compared to routine practice. The trial also aims to assess the usability of the CDSA strategy. The study will be conducted in primary healthcare facilities across different epidemiological regions of Senegal.

Rural Water Filtration and Health Study

The goal of this intervention trial is to learn if the use of drinking water filters will result in improved health outcomes for people living in homes with well water and spring water in rural regions of Central Appalachia.

GI Alpha-Gal Study

This is a double-blind, crossover food challenge study using pork with and without α-gal in patients with a clinical diagnosis of gastrointestinal (GI)- α-gal allergy, and to investigate the pathophysiology underlying their symptoms.

Vedolizumab for the Prevention of ICI Related Diarrhea or Colitis in Patients With Cancer

The purpose of this study is to assess the prevention of immune checkpoint inhibitors (ICI) related diarrhea/colitis using vedolizumab in participants with unresectable stage III or metastatic stage IV cancer, starting standard of care (SOC) immunotherapy

Evaluation of a Comprehensive School Health Programme in Zambia

In Zambia, the health and well-being of children aged 5 to 14 has often been overlooked, leading to various health challenges affecting their development and education. The Healthy Learners (HL) program, in collaboration with the Zambian Government, aims to address this gap by implementing a comprehensive school health program. Trained teachers, known as school health workers (SHWs), play a key role by delivering health education, coordinating preventative care with local clinics, and overseeing a 'school health room' for sick students. This study is a large cluster-randomized control trial in 225 schools. The goal of this trial is to compare the effects of the comprehensive school health programme (SHP) developed by HL against two alternatives: the current level of school health provision and the current school health activities enhanced with deworming and vitamin A coordination by HL, with their technical and financial support ensuring the reliable delivery of all health activities currently planned by the government. 1. What is the impact of the program on health-seeking, health, and education outcomes? 2. What are the indirect effects of the program on teachers and clinics? 3. What is the added value of such a comprehensive SHP, compared to (i) optimized (ii) or imperfect (status-quo) delivery of a limited range of school health activities (e.g., deworming and vitamin A supplements)? 4. How costly is the comprehensive SHP, and what factors affect its implementation? 5. What are the potential benefits of the program for long-term human capital accumulation (learning, well-being etc)?

A Clinical Trial to Evaluate the Effects of a Fibre Supplement on Microbiome and Gut Health

This study will evaluate the effects of the Artah Essential Fibre+ supplement on the microbiome and gut health over an 8-week period. The study is a single-arm, unblinded virtual trial enrolling 50 participants who will consume the test product daily and complete questionnaires at Baseline, Week 2, Week 4, Week 6, and Week 8. A subgroup of 30 participants will provide stool samples for microbiome testing at Baseline and Week 8. All participants will provide body composition measurements using a smart scale at Baseline, Week 4, and Week 8. Secondary outcomes include participants' self-reported perceptions of the product's effects on gut health, metabolism, food cravings, appetite, and general well-being.

Rifaximin 200 mg Plus Oral Rehydration vs Oral Rehydration Alone in Children With Acute Diarrhea

The goal of this clinical trial is to learn how rifaximin 200 mg is processed in the body (pharmacokinetics) in children 6 to 11 years old with acute diarrhea that may be caused by bacteria. It will also learn about the safety and effectiveness of rifaximin when given with oral rehydration therapy (ORT) compared with ORT alone. The main questions it aims to answer are: How does rifaximin 200 mg move through and leave the body in children with acute diarrhea? Is rifaximin safe for children in this age group? Does rifaximin plus ORT help resolve diarrhea faster than ORT alone? Researchers will compare rifaximin plus ORT to ORT alone to see if adding rifaximin improves outcomes. Participants will: Take one rifaximin 200 mg tablet + ORT three times a day for 3 days or receive ORT alone Receive oral rehydration therapy according to the investigator's standard of care Attend up to 4 clinic visits over 5 days and receive 4 follow-up phone calls Provide blood samples on Day 1 and Day 3 for pharmacokinetic testing (rifaximin group only) Provide stool samples to identify bacterial pathogens Keep a diary of stool frequency and consistency to help determine when diarrhea resolves Be monitored for side effects, vital signs, and laboratory changes

Safety of Lactobacillus LB Postbiotic in Immunocompromised Paediatric Patients With Diarrhoeal Disease

This prospective, interventional, single-center, open-label, phase 1 clinical trial to assess the safety of the Postbiotic Lactobacillus LB in immunocompromised paediatric patients with diarrhoeal disease will be performed at Federico Gomez Children's Hospital of México. Patients will be screened by investigators from hospitalized patients. For eligible children, parents will be invited to participate in the study and provide written consent, in patients of age 8 years and older, informed assent will also be required. Once enrolled, patients' demographic and stratification information will be obtained from the clinical record when applicable, if not, it will be directly collected by the investigator. Patients who have immunocompromise, as per investigator assessment, irrespective of the cause, will receive Lactobacillus LB (Lactéol®) sachets twice daily for 14 days for patients with acute diarrhoeal disease (\<72 hours of onset) and for 28 days for patients with chronic diarrhoea (≥15 days). Patients will continue follow-up while receiving treatment in hospital, whereas patients who are discharged during the treatment period will continue follow-up via phone calls once weekly and a final evaluation of outcome variables in outpatient clinic at the end of the intervention. Data regarding adverse events, as well as the stop of diarrhoea (\<3 bowel movements in 24 hours or return to habitual bowel movement frequency) and improvement in stool consistency (at least one point decrease in Bristol Stool Scale) will be collected in every evaluation. Afterwards, the presence or absence of adverse events will be established with a binomial test. As efficacy evaluation is not the main objective of the study, efficacy will be assessed as exploratory variables as presence or absence of efficacy endpoints with the binomial test. If feasible, results may be stratified according to nutritional status, time of onset of diarrhoea, and treatment compliance.

A Study of SER-155 to Treat Diarrhea in People on Immunotherapy

The purpose of this study is to find out whether SER-155 may be a safe first treatment that causes few or mild side effects for people due to irEC.

Gut Microbiota and Diarrhea in Breast Cancer Patients Receiving Pyrotinib

Background: Pyrotinib is an effective targeted drug for HER2-positive breast cancer, but it very frequently causes diarrhea, which can be severe enough to disrupt treatment and reduce patients' quality of life. The reason why some patients develop diarrhea while others do not is not well understood. Recent research suggests that the community of bacteria in the gut (gut microbiota) may play a key role in this side effect. What is the purpose of this study? This is an observational study (Phase 1) that aims to understand the relationship between pyrotinib treatment, changes in gut bacteria, and the occurrence of diarrhea. The main goal is to compare the gut bacteria of patients who develop diarrhea while taking pyrotinib with those who do not. Researchers hope to identify specific bacteria that might protect against diarrhea, which could lead to new ways to prevent or treat this side effect in the future. What will happen in the study? Patients with HER2-positive breast cancer who are being treated with pyrotinib will be invited to participate. They will be divided into two groups: those who experience diarrhea and those who do not. Participants will provide stool samples at specific time points (e.g., 2 and 4 weeks after starting pyrotinib). They will also allow researchers to collect information from their medical records about their clinical condition and diarrhea symptoms. No experimental intervention will be administered in this phase of the study; all patients will receive standard medical care. Potential Benefits: Participants will not receive any direct benefit from this observational phase of the study. However, the information gathered may help scientists better understand pyrotinib-induced diarrhea and develop future strategies to help other breast cancer patients manage this side effect more effectively.

A Post-marketing Observational Study of Oral Cholera Vaccine

Chinese survey data indicate that the incidence rate of diarrhea in the general population ranges from 0.17 to 0.70 episodes per person-year, whereas among children under five years of age, the rate is significantly higher, ranging from 2.50 to 3.38 episodes per person-year. Over recent decades, rapid economic development has contributed substantially to the reduction of mortality associated with infectious diseases. However, emerging challenges-such as increasing antimicrobial resistance and heightened population mobility-have complicated efforts in infectious disease prevention and control. In a phase III clinical trial of the recombinant B subunit/bacterial whole-cell cholera vaccine (enteric-coated capsule), a statistically significant difference was observed in the overall incidence of diarrhea between the vaccinated group (12.9%) and the control group (26.7%) (P \< 0.01). Findings from similar vaccine studies conducted in Sweden have demonstrated cross-protection against diarrhea caused by enterotoxigenic Escherichia coli (ETEC) and other intestinal pathogens. Specifically, the vaccine conferred a 50% protection rate against Salmonella enterica infections, 82% against mixed infections involving ETEC and Salmonella, and 71% against mixed infections involving ETEC and other pathogens. Evidence from relevant studies suggests that the recombinant B subunit/bacterial whole-cell cholera vaccine may offer protective benefits against non-cholera infectious diarrhea. Nevertheless, there remains a paucity of real-world effectiveness data, particularly in pediatric populations who bear a disproportionately high burden of diarrheal disease.

Bristol Stool Scale-Based Care Pathway for Enteral Nutrition-Associated Diarrhea in Critically Ill Patients

Enteral nutrition-associated diarrhea (ENAD) is one of the most common gastrointestinal complications in critically ill patients receiving enteral nutrition, with a reported incidence of 22.3%-63.1%. Current management lacks a standardized nursing process and relies on individual nurse experience. This study constructs a standardized nursing care pathway driven by the Bristol Stool Form Scale (BSFS) and evaluates, in a prospective randomized controlled design, whether it reduces the severity of ENAD compared with routine ICU care. Eligible mechanically fed ICU patients are randomized 1:1 to the care-pathway group or the routine-care group, observed for 7 days (D1-D7) with a follow-up assessment on D14. The primary endpoint is the Hart diarrhea score over the observation period.

GLP-1 Receptor Agonists and Early Proctologic Effects in Morbid Obesity

Prospective observational cohort study evaluating the early proctologic effects of GLP-1 receptor agonist therapy in morbidly obese patients. Participants will undergo baseline and 3-month anorectal symptom assessment and proctologic examination to evaluate newly developed proctologic diseases and changes in pre-existing symptoms.

Intestinal Microbiome and Chemotherapy

Chemotherapy is commonly used as myeloablative conditioning treatment to prepare patients for haematopoietic stem cell transplantation (HSCT). Chemotherapy leads to several side effects, with gastrointestinal (GI) mucositis being one of the most frequent. Current models of GI mucositis pathophysiology are generally silent on the role of the intestinal microbiome. The aim of the study is to identify functional mechanisms by which the intestinal microbiome may play a key role in the pathophysiology of GI mucositis, the investigators applied high throughput DNA-sequencing analysis to identify microbes and microbial functions that are modulated following chemotherapy.

Wells and Enteric Disease Transmission

Approximately 40 million people in the US are served by private, and frequently untreated, wells. Our best estimate is that 1.3 million cases of gastrointestinal illnesses (GI) per year are attributed to consuming water from untreated private wells in the US, but in reality, there are no robust epidemiological data that can be used to estimate cases of GI attributable to these sources. We propose the first randomized controlled trial (RCT) to estimate the burden of GI associated with private well water. We will test if household treatment of private well water by ultraviolet light (UV) vs. sham (inactive UV device) decreases the incidence of GI in children under 5. We will also examine the presence of viral, bacterial, and protozoan pathogens in stool and well water from participants. These data will fill a knowledge gap on sporadic GI associated with federally-unregulated private water supplies in the US.

Clinical Study to Assess the Efficacy of Once-daily IMM-124E (Travelan®) in a Controlled Human Infection Model.

This is a randomized, double-blind, placebo-controlled study to investigate a single daily dose of Travelan® protects healthy adult volunteers from moderate-to-severe diarrhea upon challenge with Enterotoxigenic Escherichia coli (ETEC) strain H10407.

Enabling Microbiomics- Driven Personalized Nutrition

The goal of this observational research study is to determine how diet contributes to various gastrointestinal related conditions. The main question investigators aim to answer is: Are host genetics, diet, and microbiome all important determinants of GI disorders, and how their relative contribution varies among individuals and populations.

Balanced Crystalloid vs Normal Saline in Pediatric Acute Gastroenteritis

Acute gastroenteritis (AGE) is among the most common reasons for paediatric emergency visits. Children with significant dehydration often require intravenous (IV) fluid therapy. Two main types of IV crystalloid solutions are currently used in clinical practice: 0.9% sodium chloride (normal saline, NS) and balanced crystalloids such as Isolyte-S, which contain acetate and gluconate as bicarbonate precursors. Normal saline has a high chloride content (154 mEq/L), which may worsen the metabolic acidosis already present in many children with acute gastroenteritis. Balanced crystalloids have a chloride content closer to that of plasma (98 mEq/L) and additionally contain acetate and gluconate, which are metabolised in peripheral tissues to consume hydrogen ions and thereby raise serum bicarbonate - a mechanism distinct from simply avoiding chloride overload. This study prospectively observes and compares early biochemical and clinical outcomes in children with acute gastroenteritis who receive one of these two fluid types as part of their routine clinical care. The treating physician independently decides which fluid to use; the research team does not influence this decision and does not order any additional tests or procedures. Laboratory values used as outcomes are drawn solely from blood tests obtained as part of standard care. The primary aim is to determine whether, at approximately 4 hours after IV fluid start, serum bicarbonate has changed more in children who received a balanced crystalloid compared with those who received normal saline. Secondary aims include comparing blood pH, chloride levels, need for additional IV boluses, time to first oral fluid intake, hospitalisation rate, and 72-hour return visits.