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Pediatrics

Is intestinal dysbiosis the cause of persistent diarrhea?

Diarrhea
Pediatrics Gastroenterology

Persistent diarrhea is a major cause of child mortality but its origin remains controversial. The composition of the intestinal microbiota is a hypothesis which could lead to numerous answers regarding this disease with an unclear pathogenesis.

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About this article

Created 21 October 2019
Updated 06 January 2022

IS PERSISTENT DIARRHEA AN INFECTIOUS DISEASE...

Persistent diarrhea is a particular form of the disease, defined as an episode lasting more than 14 days (beyond 30 days, it is called “chronic diarrhea”). The mortality rate attributed to persistent diarrhea has been determined (54% of all deaths caused by diarrhea) but its pathogenesis is still poorly understood: is it the progression of an acute episode or a disease in its own right? Through a literature review it was revealed that the majority of researchers consider persistent diarrhea to be an infectious disease associated to an intestinal colonization by pathogenic bacteria, be it followed by an acute or another episode.20 This colonization could be promoted by malnutrition and other factors (especially exposure to antibiotics) susceptible to cause intestinal dysbiosis.

... OR IS IT DUE TO MICROBIAL DYSBIOSIS?

Among other etiologic hypotheses, the theory of a bacterial outbreak is gaining momentum. It was born from the observation that an abundant presence of commensal bacteria, especially Escherichia coli, disrupts lactose absorption. Connecting intestinal dysbiosis, levels of E. coli and persistent diarrhea could provide several clues to elucidate it pathogenesis. On this topic, certain probiotics have shown their efficacy to reduce the duration of acute diarrhea and persistent diarrhea in children.21, 22

Image
Intestinal-dysbiosis-infographie-1

IDENTIFIED RISK FACTORS

An analysis of scientific literature provided a draft model of the disease pathogenesis. The first risk factor category includes very young age (under 1, risk x 3), malnutrition (risk x 2) and low birth weight (risk x 1.8). The second category includes an infection in the previous month (risk x 2) and a history of persistent diarrhea (risk x 3 to 6). The third category is related to eating habits (diet, breast milk substitutes...) which can multiply the risk by 4. Other factors have also been identified, including administration of antibiotics. Potential etiologies and confirmed risk factors underline the importance of a close collaboration between pediatricians, gastroenterologists, nutritionists and biologists. Interdisciplinarity could help obtain a deeper understanding of the relationships between infection, dietary habits and pathogenic and commensal microorganisms.  

Sources

20 Sarker SA, Ahmed T, Brüssow H. Persistent diarrhea: a persistent infection with enteropathogens or a gut commensal dysbiosis?. Environ Microbiol. 2017;19(10):3789-3801.

21 Dinleyici EC, Kara A, Ozen M, et al. Saccharomyces boulardii CNCM I-745 in different clinical conditions. Expert Opin Biol Ther. 2014;14(11):1593-1609.

22 Basu S, Chatterjee M, Ganguly S, et al. Effect of Lactobacillus rhamnosus GG in persistent diarrhea in Indian children: a randomized controlled trial. J Clin Gastroenterol. 2007;41(8):756-760.

23 Girardin M, Frossard JL. Place des probiotiques dans le traitement des maladies inflammatoires intestinales. Rev Med Suisse. 2012;8(352):1674-1678.

Tags
Dysbiosis Diarrhea Probiotics Gut health Children & baby health

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    Focus
    Microbiota and child health
    • Impact of antibiotics
      • Antibiotics, child microbiota and long-term health effects
      • Focus on the risks of excess weight and obesity
      • Zoom on the risks of IBD
    • Behavioral disorders
      • The role of oral and intestinal microbiota and mycobiome in autism
      • Gut-brain axis and ADHD in adolescents
    • Respiratory diseases
      • Respiratory microbiota and pulmonary infections associated with cystic fibrosis
      • Nasal microbiota: a reliable marker of bronchiolitis severity
    • Gastrointestinal disorders
      • Infectious diarrhea and intestinal microbiota
      • Is intestinal dysbiosis the cause of persistent diarrhea?
    • Expert opinion
      • Pr. Olivier Goulet : Gastrointestinal disorders in children, the need to act
    Created 21 October 2019
    Updated 06 January 2022

    About this article

    To know more about this topic.

    Main topic

    Diarrhea

    Medical practice

    Pediatrics Gastroenterology

    Content type

    Dossier detail
    Infectious diarrhea and intestinal microbiota
    Pr. Olivier Goulet : Gastrointestinal disorders in children, the need to act
    Focus

    Microbiota and child health

    Impact of antibiotics

    Antibiotics, child microbiota and long-term health effects Focus on the risks of excess weight and obesity Zoom on the risks of IBD

    Behavioral disorders

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    Respiratory diseases

    Respiratory microbiota and pulmonary infections associated with cystic fibrosis Nasal microbiota: a reliable marker of bronchiolitis severity

    Gastrointestinal disorders

    Infectious diarrhea and intestinal microbiota Is intestinal dysbiosis the cause of persistent diarrhea?

    Expert opinion

    Pr. Olivier Goulet : Gastrointestinal disorders in children, the need to act

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