A Study to Investigate the Effect of Probiotics (L. Reuteri ATCC PTA 5289 and L. Reuteri DSM 17938) on Symptoms of Viral Upper Respiratory Tract Infections in Children

This study is exploring how certain types of probiotics, called Lactobacillus reuteri (strains ATCC PTA 5289 and DSM 17938), might help children with colds, coughs, and other upper respiratory infections. Probiotics are good bacteria that help keep our bodies healthy. The study wants to see if these probiotics can make symptoms like fever and pain less severe in kids aged 4 to 17. Children who want to join should have symptoms like coughing or a runny nose and must test negative for strep throat. They also should not have taken antibiotics or other probiotics recently. This study does not involve any invasive procedures or treatments, and participation includes taking the probiotic and attending scheduled visits. Risks are minimal, but it's important to follow the study rules carefully.

• **Study Duration:** Participation involves taking probiotics and scheduled visits.
• **Eligibility:** Kids aged 4-17 with cold symptoms, no recent antibiotic use.
• **Compensation:** Details are not specified, but typically studies compensate for time and travel.