Resende et al. (13) demonstrated that in toxocariasis, there is a mixture of Th2 and Th17 inflammatory responses, observed by the increase of the cytokines IL-4, IL-5, IL-13, IL-6, and IL-17 in the serum of mice, during the phase of larval migration, showing that T. canis larvae are capable of triggering IL-17 production. This evidence concerns the gene IL6 and toxocariasis.