Clinical severity score-guided metagenomic analysis identifying gut microbial taxonomic and functional markers for severe hepatitis E progression.

Gut microbiome alterations, especially lactate-utilizing bacteria like Veillonella atypica, strongly associate with hepatitis E severity, achieving an AUC of 0.944 in classification.

• Why it matters: Understanding microbiome determinants of hepatitis E severity can improve patient stratification and reveal potential therapeutic targets, addressing a significant knowledge gap in disease progression.
• What they did: Shotgun metagenomic sequencing was performed on fecal samples from 125 individuals across hepatitis E severity stages, using XGBoost and LASSO methods to identify key taxonomic and functional markers linked to disease severity.
• The result: The study identified a microbiome signature involving lactate metabolism and beneficial commensals that explains up to 61% of severity variance, offering candidate biomarkers and a framework for future mechanistic and therapeutic research.