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The relationship of microbial pathogens to acute infectious diarrhoea of childhood
1Wellcome Research Unit, Christian Medical College and Hospital, Vellore, India.
Abstract:
Bacterial, viral and parasitic enteric pathogens were detected in 692 of 916 children below 36 months of age with acute diarrhoea and in 289 of 587 matched controls. The rates of identification of only four groups of pathogens, rotavirus, Shigellae, Salmonella typhimurium and enterotoxigenic E. coli, were significantly higher in the patients. The prevalence of a variety of other enteric pathogens was similar in controls of patients. Shigellosis had a characteristic clinical profile but none of the other agents could be suspected on clinical grounds. The high prevalence of pathogens in controls suggested that the population may be partially protected against a variety of enteric pathogens and that final common pathways leading to diarrhoea may be activated by changes in the microbial ecology of the gut lumen.
Insights
Many children with acute diarrhea had enteric pathogens, but controls also showed high pathogen rates. This suggests gut microbial changes, not just specific pathogens, may cause diarrhea in this population.
Area of Science:
- Pediatrics
- Infectious Diseases
- Microbiology
Background:
- Acute diarrhea is a major health concern in young children.
- Identifying specific enteric pathogens is crucial for effective treatment and prevention.
- The role of gut microbial ecology in diarrhea pathogenesis requires further investigation.
Purpose of the Study:
- To determine the prevalence of bacterial, viral, and parasitic enteric pathogens in children with acute diarrhea compared to healthy controls.
- To investigate whether specific pathogens are more frequently associated with acute diarrhea in children.
- To explore the potential role of gut microbial ecology in the development of acute diarrhea.
Main Methods:
- Case-control study design.
- Detection of enteric pathogens using microbiological and molecular techniques.
- Clinical data collection and analysis.
Main Results:
- Enteric pathogens were detected in a significant proportion of both children with acute diarrhea (692/916) and matched controls (289/587).
- Rotavirus, Shigellae, Salmonella typhimurium, and enterotoxigenic E. coli were identified significantly more often in patients.
- Other enteric pathogens showed similar prevalence in both groups, and clinical symptoms did not reliably predict specific causative agents, except for Shigellosis.
Conclusions:
- The high prevalence of pathogens in controls suggests a potential partial protection within the population.
- Specific pathogens like rotavirus and Shigellae are associated with acute diarrhea, but clinical presentation is not always indicative.
- Changes in gut microbial ecology may be a key factor in activating common pathways leading to diarrhea.