EDP1815

The efficacy of EDP1815 will be measured by achieving a decrease of at least 50% from baseline in Eczema Area Severity Index (EASI) score of 50 (EASI-50) at Week 16. The EASI is a validated measure of eczema severity, which considers a combination of the disease severity and body surface area affected across 4 body regions. The EASI score ranges from 0 - 72. A lower score indicates a better outcome.

The Psoriasis Area and Severity Index Score (PASI) is a physician assessment that combines the assessment of the severity of and area affected by psoriasis into a single score in the range 0 (no disease) to 72 (maximal disease).The efficacy of EDP1815 will be measured using the mean percentage change in PASI from baseline to week 16.

This will be measured as basal flow (arbitrary units, AU) by LSCI.

Number of participants with AEs by seriousness and relationship to treatment

Number of participants with clinically significant change from baseline (Day 0) in laboratory values

Number of participants with clinically relevant changes from baseline (Day 0) ECG parameters

Physical examination of stool samples based on the Bristol Stool Scale (Types 3 and 4 are ideal stool): Type 1: Separate hard lumps, like nuts (hard to pass); Type 2: Sausage-shaped, but lumpy; Type 3: Like a sausage but with cracks on its surface; Type 4: Like a sausage or snake, smooth and soft; Type 5: Soft blobs with clear cut edges (easy to pass); Type 6: Fluffy pieces with ragged edges, a mushy stool; Type 7: Watery, no solid pieces, entirely liquid

GI safety measurement through fecal calprotectin analysis