IL17A and tuberculosis: Thus, these observations confirmed that IL-17A is important for granuloma formation, considering that one of its main functions is cell recruitment, which contributes to the formation of these structures that participate in the control of bacillary proliferation and spread of infection, agreeing with previously reported observations in murine models of TB using M. bovis vaccine strains [42, 86], low-virulence M. tuberculosis strains [87], or even the highly virulent Beijing M. tuberculosis strain [88].