Related Experiment Video
Updated: Jun 6, 2026

Probiotic Studies in Neonatal Mice Using Gavage
Published on: January 27, 2019
A randomized controlled trial of Lactobacillus GG in children with functional abdominal pain
Ruggiero Francavilla1, Vito Miniello, Anna Maria Magistà
1Department of Developmental Biomedicine, Gastroenterology Section, University of Bari, Bari, Italy. rfrancavilla@libero.it
Insights
Lactobacillus rhamnosus GG (LGG) significantly reduced abdominal pain in children with irritable bowel syndrome (IBS). This probiotic intervention improved gut barrier function and provided sustained symptom relief.
Area of Science:
- Pediatric Gastroenterology
- Microbiome Research
- Clinical Nutrition
Background:
- Recurrent abdominal pain is a common issue in children, significantly impacting their quality of life.
- Irritable bowel syndrome (IBS) and functional abdominal pain are frequent diagnoses in pediatric populations.
- The gut microbiome and barrier function are increasingly recognized as factors in functional gastrointestinal disorders.
Purpose of the Study:
- To evaluate the efficacy of Lactobacillus rhamnosus GG (LGG) in alleviating symptoms of recurrent abdominal pain in children.
- To assess the impact of LGG on intestinal permeability in pediatric patients with abdominal pain.
- To determine if LGG provides sustained symptom relief and improves gut barrier function.
Main Methods:
- A randomized, double-blind, placebo-controlled trial involving 141 children with IBS or functional pain.
- Participants received either LGG or a placebo for 8 weeks, followed by an 8-week follow-up period.
- Intestinal permeability was assessed using a double-sugar test at baseline and end of the trial.
Main Results:
- LGG significantly reduced both the frequency and severity of abdominal pain compared to placebo (P < .01).
- Treatment success was higher in the LGG group (48 vs. 37 children, P < .03) and effects were sustained post-intervention.
- LGG significantly decreased abnormal intestinal permeability test results (P < .03), particularly in children with IBS.
Conclusions:
- Lactobacillus rhamnosus GG (LGG) is effective in reducing abdominal pain frequency and severity in children with IBS.
- The therapeutic effect of LGG is sustained over time.
- Improvements in gut barrier function may underlie the beneficial effects of LGG in pediatric abdominal pain.
Objective:
Our aim was to determine whether Lactobacillus rhamnosus GG (LGG) relieves symptoms in children with recurrent abdominal pain.
Patients And Methods:
A total of 141 children with irritable bowel syndrome (IBS) or functional pain were enrolled in 9 primary care sites and a referral center. Children entered a randomized, double-blind, placebo-controlled trial and received LGG or placebo for 8 weeks and entered follow-up for 8 weeks. The primary outcome was overall pain at the end of the intervention period. At entry and at the end of the trial, children underwent a double-sugar intestinal permeability test.
Results:
Compared with baseline, LGG, but not placebo, caused a significant reduction of both frequency (P < .01) and severity (P < .01) of abdominal pain. These differences still were significant at the end of follow-up (P < .02 and P < .001, respectively). At week 12, treatment success was achieved in 48 children in the LGG group compared with 37 children in the placebo group (P < .03); this difference still was present at the end of follow-up (P < .03). At entry, 59% of the children had abnormal results from the intestinal permeability test; LGG, but not placebo, determined a significant decrease in the number of patients with abnormal results from the intestinal permeability testing (P < .03). These effects mainly were in children with IBS.
Conclusions:
LGG significantly reduces the frequency and severity of abdominal pain in children with IBS; this effect is sustained and may be secondary to improvement of the gut barrier.
Related Concept Videos
Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy
Diagnostic studies
A colonoscopy is the definitive screening test, distinguishing ulcerative colitis from other colon diseases with similar symptoms. During a colonoscopy test, inflamed mucosa with exudate ulcerations can be observed, and biopsies are taken to determine the histologic characteristics of the colonic...
Probiotics
Irritable Bowel Syndrome II: Clinical Features and Diagnostic Evaluation
Irritable Bowel Syndrome (IBS) is classified into subtypes based on the predominant bowel habits as determined by the Bristol Stool Form Scale (BSFS). The subtypes are:
Peptic Ulcer Disease III: Clinical Manifestations and Diagnostic Studies
Few clinical manifestations differentiate gastric ulcers from duodenal ulcers. Distinctions in the location, timing, and pain relief are crucial for healthcare providers in differentiating between gastric and duodenal ulcers during clinical assessments.
Assessment of the Gastrointestinal System II: Health Perception Pattern
Health Perception Patterns
Health perception patterns offer valuable insights into a patient's lifestyle habits and how they may impact their GI health. These patterns include:
Irritable Bowel Syndrome III: Medical and Nursing Management