In the additive and recessive models, the allele C of SNP rs3024974 located on STAT6 gene was associated with an increased risk of bearing high worm burden or high infection intensities (Z = 2.61, P = 0.009 for additive model; Z = 2.55, P = 0.01 for the recessive model) (Table 6). Here, STAT6 is linked to infection.