IL17A and tuberculosis: By contrast and worthy of note, the observation that IL-17-neutralized C57BL/6 mice displayed a decrease in BCG-induced Th1 response and in the number of DCs in draining lymph nodes lends indirect support to the recently reported role for neutrophils in promoting T cell priming in acute TB [8], since IL-17 neutralization decreases the number of neutrophils at the site of immunization in the ear vaccination model.