In addition to that, polymorphisms at some loci of IL13, STAT6 and IL10 genes have been associated not only with total IgE levels (Moller et al., 2007; Grant et al., 2011; Potaczek and Kabesch, 2012), but also with other helminthic infections such as Ascaris infections (Moller et al., 2007; Peisong et al., 2004; Moller et al., 2007; Figueiredo et al., 2013). This evidence concerns the gene STAT6 and helminthiasis.