Biofilms show disease-specific changes on ASV level. ASV-based differences (as determined with DESeq2) between BF– and BF+ biopsies, between BF– and areas without biofilm from BF+ patients (Distal-Bx), stool from BF+ and BF– patients, in each disease cohort. Additional comparison between UC inflamed areas of BF+ (inflamed BF+) and BF– patients. Size of dots represent fold-change, full dots represent up-regulation in biofilm setting, empty dots represent down-regulation. Dots are colored based on bacterial phylum, bacterial taxonomies (genera and species) have been assigned to each ASV based on the SILVA reference database. Only significant findings (P < .05 after correction for multiple comparisons) are shown. n = 35 BF+, n = 38 BF–, n = 30 Distal-Bx, n = 5 inflamed BF+, n = 6 inflamed BF–, n = 51 BF+ stool samples, n = 54 BF– stool samples.