Deep Tubewell Use and Child Diarrhea in Rural Bangladesh: Results from a Prospective Community Surveillance Study

Area of Science:

• Environmental health
• Public health
• Epidemiology

Background:

• Diarrheal diseases are a major cause of mortality in under-five children in South Asia.
• Deep tubewells were installed in rural Bangladesh to provide arsenic-free, microbially safe drinking water.
• Sparsely distributed deep tubewells may lead to increased microbial contamination during water handling, potentially negating benefits.

Purpose of the Study:

• To examine the association between deep tubewell use and diarrheal disease risk in under-five children.
• To investigate how social and environmental factors modify this association.

Main Methods:

• Community diarrheal disease surveillance was conducted in Matlab, Bangladesh (March 2018 - October 2019).
• Generalized Estimating Equations (GEE) were used to compare diarrheal disease prevalence between deep and shallow tubewell users.

Main Results:

• Children using deep tubewells had 17% lower diarrheal disease prevalence compared to shallow tubewell users (RR=0.83, 95% CI: 0.71-0.96).
• Protective effects were stronger for households with on-compound wells, in flood-prone areas, and using unimproved latrines.
• Deep tubewell use showed greater protection during the dry season.

Conclusions:

• Deep tubewell use does not appear to increase diarrhea risk and may reduce it, particularly in areas with higher microbial contamination.
• The findings highlight the importance of considering water handling and storage in the context of drinking water interventions.
• Optimizing deep tubewell implementation can further mitigate diarrheal disease burden in vulnerable populations.