CXCL8 and irritable bowel syndrome: Apical media fractions from T84 cells exposed to PI-IBS associated C. jejuni strains had significantly higher IL-8 as compared to media fractions from control strains (PI-IBS: 117.7 (27.38) pg/mL vs. control: 97.8 (27.85) pg/mL, p = 0.01) (Fig. 6a).