Gastroenteritis

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

Compare the effectiveness of automatic vs as-needed (PRN) post-hospitalization follow-up for children who are hospitalized for common infections.

A Randomized, Open-label, Active-Controlled Clinical Trial to Investigate the Efficacy and Safety of Ondansetron compared to Metoclopramide in the management of Nausea and Vomiting in Adult Patients with Acute Gastroenteritis.

Define the prevalence of fecal phage carriage in individuals with digestive symptoms (i) Determine the concentrations of infectious fecal phages in the stools of individuals with digestive symptoms (detection by culture) (ii) Determine fecal phage genome concentrations in the stools of individuals with digestive symptoms (PCR detection) (iii) Explore factors that could impact fecal phage carriage (patients with digestive symptoms vs. healthy individuals, immunocompromised patients vs. immunocompetent patients)

Many ambulatory networks are mainly based on diagnoses made by first-line physicians not specifically trained to join the network. Here we aim to set up a surveillance network on pediatric infectious diseases with an investment in teaching with specific trainings of participating pediatricians, increasing in use of point of care tests, and automated data extraction from the computers of the pediatricians.