Infectious Diarrhea in Early Childhood across the Global South: Etiologic Diversity and Pathogenic Mechanisms

Dharitri Chaudhuri1, Dipro Mukherjee1, Avinash R Shenoy2

  • 1Department of Developmental Biology & Genetics, Indian Institute of Science, Bengaluru 560012, India.

ACS Infectious Diseases
|January 7, 2026
PubMed

Insights

Diarrhea remains a major killer of young children globally, especially in low- and middle-income countries (LMICs). This review explores pathogen mechanisms to guide new vaccine and therapeutic development.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Public Health

Background:

  • Diarrhea is a leading cause of mortality in children under five, particularly in LMICs.
  • Poor hygiene, sanitation, and water access exacerbate diarrhea incidence.
  • Enteropathogens like bacteria, viruses, and protozoa cause diarrhea, with limited vaccine options and rising antimicrobial resistance.

Purpose of the Study:

  • To review the pathogenesis mechanisms of enteropathogens causing diarrhea in the Global South.
  • To identify targets for novel therapeutics and vaccines.

Main Methods:

  • Literature review of distinct and overlapping enteropathogen pathogenesis.
  • Analysis of mechanisms relevant to LMIC contexts.

Main Results:

  • Enteropathogens utilize diverse mechanisms to cause diarrhea.
  • Understanding these mechanisms is crucial for intervention development.

Conclusions:

  • There is a need for effective vaccines and therapeutics against common enteropathogens.
  • Exploiting pathogen-specific mechanisms can lead to new treatment and prevention strategies.

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