ArticlePLoS neglected tropical diseases2026
Fecal biomarkers to characterize intestinal inflammation among children with medically attended diarrhea across six low-resource settings: Findings from the Enterics for Global Health (EFGH) Shigella surveillance study.
Article in PLoS neglected tropical diseases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundFrequent enteric infections can damage the small intestine causing inflammation and malabsorption, leading to environmental enteric dysfunction. We aimed to characterize the association between intestinal inflammation and enteric pathogens among children in low- and middle-income countries (LMICs) who presented to care with diarrhea. METHODOLOGY/PRINCIPLE
findingsWe conducted a cross-sectional analysis within the Enterics for Global Health - Shigella surveillance study at six LMIC sites: Bangladesh, Kenya, Malawi, Pakistan, Peru, and The Gambia. From August 2022 to July 2024, rectal swabs and whole stool samples were collected from 4,903 children with medically attended diarrhea aged 6-35 months (44.4% females, n = 2178/4903; mean age: 15.4 months ± 7.4 months) and were analyzed for Shigella and four fecal inflammatory biomarkers: hemoglobin, lipocalin-2, myeloperoxidase, and calprotectin via Enzyme Linked Immunosorbent Assays. Caregivers and clinicians demonstrated moderate accuracy in identifying blood in stool compared to fecal hemoglobin (area under the curve (AUC)=0.70). Among 10 pathogens evaluated, Shigella-attributable diarrhea had the highest concentrations of calprotectin, hemoglobin, and myeloperoxidase. Shigella culture-/PCR+ episodes had intermediate levels of inflammation between culture-/PCR- and culture+ episodes. In multivariable models restricted to Shigella episodes, dysentery was positively associated and vomiting was negatively associated with biomarker concentrations, with the strongest associations observed for hemoglobin (dysentery geometric mean ratio: 12.82 (95% CI: 7.21, 22.77) and vomiting geometric mean ratio: 0.45 (95% CI: 0.23, 0.86)). Age, sex, and both acute and chronic malnutrition were not associated with inflammatory biomarker concentrations. CONCLUSIONS/SIGNIFICANCE: Hemoglobin appeared to be a more sensitive marker of blood in stool than visual observation. While Shigella was associated with heightened levels of all inflammatory biomarkers, hemoglobin was most strongly associated with Shigella, especially among attributable and culture positive episodes. The distinct clinical characteristics of Shigella were most closely associated with elevated hemoglobin concentrations.
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