IL10 and irritable bowel syndrome: The CC genotype of the IL10-819T/C (rs1800871) polymorphism was found more frequently in IBS patients [81 (65.9%)], compared to group 2 (31 (48.4%) patients) and the group of intact subjects 32 (45.7%) (P < .02), in contrast to the genotype CT, which was detected less frequently in patients with IBS (P < .05) and which may confirm the value of SNP data of the -819T/C (rs1800871) polymorphism in the clinical course of IBS.