Related Experiment Video
Updated: Apr 12, 2026

Individualized Reconstitution of Human Milk Microbiota: A Feasible Approach in Real-World Settings
Published on: February 7, 2025
Lactobacillus reuteri DSM 17938 shortens acute infectious diarrhea in a pediatric outpatient setting
Ener Cagri Dinleyici1, Nazan Dalgic2, Sirin Guven3
1Faculty of Medicine, Department of Pediatrics, Pediatric Intensive Care and Infectious Disease Unit, Eskisehir Osmangazi University, Eskisehir, Turkey.
Insights
Lactobacillus reuteri DSM 17938 significantly reduced diarrhea duration in outpatient children. This probiotic is safe and well-tolerated for treating acute infectious diarrhea in children.
Area of Science:
- Microbiology
- Pediatric Gastroenterology
- Clinical Research
Background:
- Previous studies demonstrated Lactobacillus (L.) reuteri DSM 17938 efficacy in hospitalized children with acute infectious diarrhea.
- This study aimed to evaluate L. reuteri DSM 17938 in an outpatient setting for pediatric acute infectious diarrhea.
Purpose of the Study:
- To assess the efficacy and safety of L. reuteri DSM 17938 in treating acute watery diarrhea in children presenting at outpatient clinics.
- To compare the duration of diarrhea and recovery rates between children receiving L. reuteri DSM 17938 and those receiving only oral rehydration solution (ORS).
Main Methods:
- A multicenter, randomized, single-blinded, case-control trial involving 64 children with acute watery diarrhea.
- Participants received either L. reuteri DSM 17938 (1×10^8 CFU/day for 5 days) plus ORS, or ORS alone.
- Primary endpoint: duration of diarrhea (hours); Secondary endpoints: daily diarrhea incidence and adverse events.
Main Results:
- The mean duration of diarrhea was significantly shorter in the L. reuteri group (60.4 hours) compared to the control group (74.3 hours) (p<0.05).
- A lower percentage of children in the L. reuteri group experienced diarrhea after 48 hours (44.8%) versus the control group (87%) (p<0.01).
- No adverse effects were associated with L. reuteri administration.
Conclusions:
- L. reuteri DSM 17938 is an effective treatment for reducing the duration of acute infectious diarrhea in outpatient children.
- The probiotic demonstrated a favorable safety profile and was well-tolerated in the pediatric population studied.
- These findings support the use of L. reuteri DSM 17938 as a therapeutic option for pediatric acute infectious diarrhea in outpatient settings.
Objective:
Two randomized controlled clinical trials have shown that Lactobacillus (L) reuteri DSM 17938 reduces the duration of diarrhea in children hospitalized due to acute infectious diarrhea. This was the first trial evaluating the efficacy of L. reuteri DSM 17938 in outpatient children with acute infectious diarrhea.
Methods:
This was a multicenter, randomized, single-blinded, case control clinical trial in children with acute watery diarrhea. A total of 64 children who presented at outpatient clinics were enrolled. The probiotic group received 1×10(8)CFU L. reuteri DSM 17938 for five days in addition to oral rehydration solution (ORS) and the second group was treated with ORS only. The primary endpoint was the duration of diarrhea (in hours). The secondary endpoint was the number of children with diarrhea at each day of the five days of intervention. Adverse events were also recorded.
Results:
The mean duration of diarrhea was significantly reduced in the L. reuteri group compared to the control group (approximately 15h, 60.4±24.5h [95% CI: 51.0-69.7h] vs. 74.3±15.3h [95% CI: 68.7-79.9h], p<0.05). The percentage of children with diarrhea was lower in the L. reuteri group (13/29; 44.8%) after 48h than the control group (27/31; 87%; RR: 0.51; 95% CI: 0.34-0.79, p<0.01). From the 72nd hour of intervention onwards, there was no difference between the two groups in the percentage of children with diarrhea. No adverse effects related to L. reuteri were noted.
Conclusion:
L. reuteri DSM 17938 is effective, safe, and well-tolerated in outpatient children with acute infectious diarrhea.
Related Concept Videos
Drugs Affecting GI Tract Motility: Antimicrobials as Antidiarrheal Agents
Drugs for Treatment of Diarrhea-Predominant IBS
Two specific drugs used in the treatment are alosetron (Lotronex) and eluxadoline (Viberzi). Alosetron, a 5-HT3 antagonist, works by slowing the movement of stools in the gut, reducing bowel...
Acute Pyelonephritis II: Diagnostic Studies and Management
Pharmacokinetics in Pediatric Patients: Drug Excretion
Bacterial Gastroenteritis
Probiotics

