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Exploring the relationship between environmental enteric dysfunction and oral vaccine responses
James A Church1,2, Edward Pk Parker3, Margaret N Kosek4
1Zvitambo Institute for Maternal & Child Health Research, Harare, Zimbabwe.
Future Microbiology
|June 22, 2018
Summary
Environmental enteric dysfunction (EED) may impact oral vaccine effectiveness in low-income nations. However, current research is limited and inconclusive, highlighting the need for further investigation into this critical public health issue.
Area of Science:
- Global Health
- Vaccinology
- Pediatric Gastroenterology
Background:
- Oral vaccines show reduced efficacy in low-income countries.
- Environmental enteric dysfunction (EED) is a potential factor, affecting gut health in impoverished children.
Purpose of the Study:
- To review existing studies on the relationship between EED and oral vaccine responses.
- To identify research gaps and future directions in this field.
Main Methods:
- Systematic review of eight studies investigating EED and oral vaccine responses.
- Analysis of study designs and reported associations between EED and vaccine outcomes.
Main Results:
- Substantial heterogeneity observed across study designs.
- Inconsistent findings: four studies showed a negative association, two no significant association, and two a positive correlation between EED and oral vaccine responses.
Conclusions:
- Current evidence is insufficient to definitively link EED to oral vaccine underperformance.
- Further well-designed research is crucial to understand and address this public health challenge.
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