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.
Abstract

Related Concept Videos

Anatomy of the Intestines01:53

Anatomy of the Intestines

Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.Small IntestinesThe small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the small intestine...
Drugs Affecting GI Tract Motility: Antimicrobials as Antidiarrheal Agents01:18

Drugs Affecting GI Tract Motility: Antimicrobials as Antidiarrheal Agents

Acute diarrhea, a common gastrointestinal disturbance, is characterized by the rapid evacuation of fluid stools, leading to an excessive weight in fluid. This condition typically arises from disorders affecting intestinal water and electrolyte transport. It can be triggered by an increased osmotic load within the intestine, excessive secretion of electrolytes and water, mucosal exudation of protein and fluid, or altered intestinal motility. The primary risks of acute diarrhea are dehydration...
Development of Human Microbiota01:30

Development of Human Microbiota

The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...
Microbiota of the Stomach and Small Intestine01:27

Microbiota of the Stomach and Small Intestine

The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...
Microbiota of the Large Intestine01:27

Microbiota of the Large Intestine

The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...
Microbiota Modulation by Antibiotics01:21

Microbiota Modulation by Antibiotics

Antibiotics have revolutionized modern medicine by saving countless lives from bacterial infections. However, their widespread use has inadvertently harmed the delicate balance of the human gut microbiota. The gut microbiota, a complex community of bacteria, archaea, viruses, and fungi, plays a vital role in regulating metabolism, immune responses, and maintaining intestinal health. Antibiotics, especially broad-spectrum types, disrupt this ecosystem by eradicating both harmful and beneficial...