IL17A and infection: On the other hand, IL-17 producing Th17 cells have been shown to play a protective role against parasite-induced myocarditis in BALB/c mice infected with 100 blood trypomastigotes (low inoculum) of the Y strain per mice (susceptible model), by inhibiting Th1 differentiation during the acute phase of infection (da Matta Guedes et al., 2010).