IL17A and ulcerative colitis: Moreover, in patients with ulcerative colitis IL-17A demonstrated a positive correlation with stool calprotectin level (p = 0.06; R = 0.31) and PUCAI (p = 0.05; R = 0.31), which almost attained statistical significance.There were no significant correlations between IL-17A and other inflammatory markers i.e. CRP, ESR, white blood cells count.