Echinococcus granulosus s.s. has been shown to regulate host immunity by biasing a Th1/Th2 response towards a chronic Th2 response [19], as the infection was found to induce a marked increase in the transcriptional levels of IFN-γ, IL-2, IL-4, IL-5, and IL-10 [11]. Here, IL5 is linked to infection.