Abstract:To investigate the association between interleukin -17 single nucleotide polymorphisms(SNPs) and plasma levels and chronic hepatitis C infection. Methods In this study, 200 patients of chronic hepatitis C were included in observation group, 150 cases of healthy subjects were enrolled into control group. TaqMan detection system was used to extract genomic DNA for detection of IL-17 SNPs. ELISA was applied to detect IL-17 level. The IL-17 level was compared between the two groups. The alleles and genotype distribution of IL -17 rs8193036 and rs2275913 loci were compared between the two groups. The relationships of IL-17 polymorphisms with the HCV genotypes were analyzed in the two groups. Results The distribution of alleles C and T of rs8193036 locus and alleles A and G of rs2275913 locus in gene in the observation group was more than that in the control group, but the differences were not statistically significant ( p> 0.05). The distribution of CC, CT and TT genotypes of rs8193036 locus and AA, AG and GG genotypes of rs2275913 locus of gene in the observation group was more than that in the control group with significant differences (p > 0.05). The level of IL-17 in the observation group (98.73 ±28.65) was higher than that in the control group (70.27±18.53), the difference was statistically significant( p< 0.05). Conclusions Elevated IL-17 level may be one of the factors of chronic hepatitis C infection.