Related Experiment Video
Updated: Mar 13, 2026

Determining Soil-transmitted Helminth Infection Status and Physical Fitness of School-aged Children
Published on: August 22, 2012
Dientamoeba fragilis colonization is not associated with gastrointestinal symptoms in children at primary care level
Gea A Holtman1, Justin J Kranenberg2, Marco H Blanker2
1Department of General Practice, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands and g.a.holtman@umcg.nl.
Insights
Dientamoeba fragilis is a common parasite in children, but this study found no increased risk for gastrointestinal symptoms. The absence of D. fragilis was paradoxically linked to symptoms like diarrhea and fatigue.
Area of Science:
- Pediatric Gastroenterology
- Infectious Diseases
- Microbiology
Background:
- Dientamoeba fragilis is frequently detected in children presenting to primary care.
- This parasite is often suspected as a cause of gastrointestinal illness in pediatric populations.
Purpose of the Study:
- To investigate the association between Dientamoeba fragilis colonization and the presence of gastrointestinal symptoms in children.
- To clarify the role of D. fragilis in pediatric gastrointestinal disease.
Main Methods:
- A cross-sectional study was conducted involving children with gastrointestinal symptoms.
- Logistic regression analyses explored symptom associations with D. fragilis colonization.
- A case-control analysis using asymptomatic siblings as controls was performed with conditional logistic regression.
Main Results:
- Dientamoeba fragilis colonization was found in 55.1% of 107 children studied.
- Absence of D. fragilis was associated with soft to watery stool, chronic diarrhea, and fatigue.
- Case-control analysis showed no significant difference in D. fragilis colonization between cases and controls (OR = 1.02).
Conclusions:
- Dientamoeba fragilis is prevalent in children, irrespective of gastrointestinal symptoms.
- The study suggests D. fragilis colonization does not elevate the risk for gastrointestinal symptoms in children.
- Unexpected associations between D. fragilis absence and certain symptoms warrant further investigation.
Background:
Dientamoeba fragilis is commonly identified in children in primary care and is suspected to cause gastrointestinal disease.
Objective:
To determine the association between D. fragilis colonization and gastrointestinal symptoms in children.
Methods:
We performed a cross-sectional study with children who presented in primary care with gastrointestinal symptoms. The associations between D. fragilis colonization and specific symptoms were explored by means of logistic regression analyses. Asymptomatic siblings of these cases were invited as control subjects for a case-control analysis, where we explored the association between D. fragilis and gastrointestinal symptoms with conditional logistic regression analysis.
Results:
In the cross-sectional study, 107 children were included. Their median age was 9 years (interquartile range = 6-12) and 38 (35.5%) were boys. Colonization of D. fragilis was present in 59 children (55.1%). The absence of D. fragilis was associated with soft to watery stool [odds ratio (OR) = 0.29; 95% confidence interval (CI) = 0.10-0.85], chronic diarrhoea (OR = 0.42; 95% CI = 0.18-0.97) and fatigue (OR = 0.45; 95% CI = 0.20-0.99). The case-control analyses included 44 children in each group. Dientamoeba fragilis colonization was not observed more often in cases than in controls after adjustment for age and sex (OR = 1.02; 95% CI = 0.28-3.65).
Conclusion:
Dientamoeba fragilis is a common parasite in children with and without gastrointestinal symptoms. The anomalous finding of the association between the absence of D. fragilis with soft to watery stools, chronic diarrhoea and fatigue are inexplicable. Our study suggests that D. fragilis colonization does not increase the risk for gastrointestinal symptoms.
More Related Videos
04:57Comparative Analysis of Automatic Fecal Analyzer versus Direct Wet Smear Microscopy for Detecting Parasitic Infections in Stool Samples
Published on: April 25, 2025
09:04Discovery of New Intracellular Pathogens by Amoebal Coculture and Amoebal Enrichment Approaches
Published on: October 27, 2013
Related Concept Videos
Fungal Phylum Microsporidia
Diversity of Protists IV
Bacterial Flora of the Large Intestine
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
Drugs Affecting GI Tract Motility: Antimicrobials as Antidiarrheal Agents