Related Experiment Video
Updated: Oct 9, 2026

Fecal Microbiota Transplantation via Colonoscopy for Recurrent C. difficile Infection
Published on: December 8, 2014
Small bowel and fecal microbiology in children suffering from persistent diarrhea in Bangladesh
P K Bardhan1, M J Albert, N H Alam
1International Cenre for Diarrhoeal Disease Research, Bangladesh Dhaka.
Insights
Enteroaggregative Escherichia coli (E. coli) were significantly associated with persistent diarrhea in Bangladeshi children. This finding suggests targeted therapies against this pathogen may help manage persistent diarrhea cases.
Area of Science:
- Microbiology
- Pediatric Gastroenterology
- Infectious Diseases
Background:
- Persistent diarrhea in children has complex causes.
- Understanding the microbial role is crucial for effective treatment.
- This study investigated microorganisms in persistent diarrhea in Bangladesh.
Purpose of the Study:
- To identify the role of microorganisms in the etiology and pathogenesis of persistent diarrhea.
- To compare microbial flora in children with persistent diarrhea, acute diarrhea, and healthy controls.
Main Methods:
- Analyzed duodenal aspirates and stool samples from children with persistent diarrhea, acute diarrhea, and healthy controls.
- Quantified total aerobic microflora and identified enteric pathogens.
- Compared microbial profiles between study groups.
Main Results:
- Children with persistent diarrhea showed a greater variety of duodenal flora compared to controls.
- Gram-negative rods predominated in persistent diarrhea, unlike Gram-positive cocci in controls.
- Enteroaggregative Escherichia coli (E. coli) were significantly associated with persistent diarrhea, along with Aeromonas spp. and Klebsiella spp.
Conclusions:
- Confirmed an association between enteroaggregative E. coli and persistent diarrhea.
- Suggests evaluating therapies targeting enteroaggregative E. coli for managing persistent diarrhea.
Background:
The etiology of persistent diarrhea in children is multifactorial. The objective of the current study was to ascertain the role of microorganisms in the etiology and pathogenesis of persistent diarrhea in a group of children in Bangladesh.
Methods:
Enteric pathogens and total aerobic microflora were studied in the duodenal aspirates of 100 children with persistent diarrhea and compared with those in aspirates of 30 children with acute diarrhea, and those in aspirates of 15 healthy control children. The enteric pathogens in the stools of these children and in stools of an additional 38 patients with persistent diarrhea and 12 with acute diarrhea were also studied.
Results:
Approximately two thirds of the patients with acute diarrhea and persistent diarrhea, and half of the control subjects had more than 10(5) organisms per milliliter of duodenal fluid. Significantly, more patients with persistent diarrhea had a greater variety of flora than did patients with acute diarrhea and control subjects. The predominant organisms in patients with acute diarrhea and in those with persistent diarrhea were Gram-negative rods, whereas those in control subjects were Gram-positive cocci. Significantly more acute diarrhea patients and persistent diarrhea patients had enteric pathogens isolated from stool than did control subjects. Diarrheagenic Escherichia coli, as a whole, were present in significantly more persistent diarrhea patients than in acute diarrhea patients and control subjects. Among diarrheagenic E. coli, enteroaggregative E. coli were significantly associated only with persistent diarrhea. Other organisms significantly associated with persistent diarrhea were Aeromonas spp. and Klebsiella spp. Some patients in the acute diarrhea and the persistent diarrhea groups had the same pathogens isolated from both the duodenal fluid and stool.
Conclusions:
In accordance with results of other studies, an association between enteroaggregative E. coli and persistent diarrhea was found in the present study. This suggests that therapy directed against enteroaggregative E. coli can be evaluated for management of some cases of persistent diarrhea.
More Related Videos
Related Concept Videos
Anatomy of the Intestines
Drugs Affecting GI Tract Motility: Antimicrobials as Antidiarrheal Agents
Development of Human Microbiota
Microbiota of the Stomach and Small Intestine
Microbiota of the Large Intestine
Microbiota Modulation by Antibiotics

