Biliary Microbiota in Choledocholithiasis and Correlation With Duodenal MicrobiotaOriginal 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?
Researchers examined whether bile bacteria predict clinical outcomes in choledocholithiasis and compared biliary microbiota composition to duodenal microbiota. Clinical data came from 488 patients; microbial sequencing came from bile and duodenal juice pairs in 10 selected patients.
How was it studied?
Logistic regression tested whether specific bile bacteria species, including antimicrobial-resistant strains, predicted recurrence, cholangitis severity, and hospital stay length. Paired bile and duodenal juice samples were analyzed with 16S rRNA sequencing and Tax4Fun functional prediction.
What did they find?
Proteobacteria and Firmicutes dominated both biliary and duodenal microbiota, with Escherichia-Shigella, Fusobacterium, and Enterococcus as top core genera and Escherichia coli the most abundant species. Alpha and beta diversity, LEfSe-identified differential taxa, functional pathways, and antimicrobial-resistance patterns showed no significant differences between the two sites.
Why it matters
Certain bile bacteria species predicted recurrence, cholangitis severity, and hospital stay, suggesting biliary microbiota data could guide clinical management. Compositional similarity between bile and duodenal microbiota supports duodenal-biliary reflux and suggests duodenal juice as a viable alternative sample when bile cannot be obtained.