Accordingly, we analyzed the expression of the chemokines CXCL9, CXCL10, and CXCL11 in unvaccinated and vaccinated mice of the strains C57BL/6, IL-23p19−/−, and IL-17A−/− after infection with Mtb via quantitative real-time RT-PCR analysis (Fig. 3a). The gene discussed is IL23A; the disease is infection.