Household Food Insecurity Alters Gut Microbiome Composition and Enriches <i>Sutterella</i> in Ethiopian SchoolchildrenOriginal paper
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Read MoreWhat was studied?
This study examined whether household food insecurity (HFI) is associated with changes in the gut microbiome of schoolchildren. The researchers used the Household Food Insecurity Access Scale (HFIAS) as a composite measure of food insecurity, and also analyzed individual HFIAS questions as specific proxies for different forms of dietary deprivation. Gut microbial communities were profiled using 16S rRNA amplicon paired-end sequencing of fecal samples. The goal was to determine whether restricted caloric intake, dietary diversity, and food quality linked to HFI translate into measurable shifts in microbiome composition.
Who was studied?
The study population consisted of 57 school-aged children in Ethiopia. Fecal samples were collected from these children, and their household food security status was assessed using the HFIAS questionnaire completed for their households. No further demographic details are given in the abstract.
What were the most important findings?
Alpha diversity did not differ significantly between food-secure and food-insecure children (Wilcoxon p > 0.05), indicating that overall species richness and evenness within individuals were not strongly affected. However, beta diversity analysis showed a significant shift in overall microbiome composition between the two groups using Bray-Curtis dissimilarity (PERMANOVA, p < 0.05). Further analysis of specific HFIAS questions found that limited dietary variety and consumption of disliked foods were among the deprivation proxies associated with these compositional differences, including enrichment of the genus Sutterella.
What are the greatest implications of this study?
These findings suggest that household food insecurity can restructure the gut microbiome even when standard diversity metrics appear unchanged, meaning composition-based analyses may be more sensitive indicators of dietary deprivation than diversity alone. The identification of specific HFIAS questions, such as limited dietary variety, as proxies linked to microbiome shifts points to particular deprivation behaviors that could be targeted in interventions. This work highlights food insecurity as a modifiable environmental factor relevant to child gut health in low-resource settings, though further research is needed to link these compositional changes to functional or clinical outcomes.