Part I — Ecological and Clinical Context
Part I establishes the ecological and clinical baseline for the entire document. It reconstructs the collapse of a previously stable microbial ecosystem, traces the downstream consequences across barrier integrity, bile-acid dynamics, immune signaling, motility, and metabolic load, and defines the system state present by 2024–2025. The chapters in this section document the progression from a functional 2022 gut architecture to a pathobiont-stabilized ecosystem dominated by Enterobacteriaceae, high permeability, bile-acid injury, and chronic immune activation.
This section also integrates clinical events, metagenomic data, and symptom trajectories to map the transition into a pathogenic steady state — the configuration that later shaped every structural decision in the restoration strategy.
→ Part I anchors the collapse model and defines the constraints that all later Parts must address.