Résumé : The present invention concerns methods for in vitro detection of an infection by Mycobacterium tuberculosis in mammals, and methods for in vitro distinction between mammals infected with Mycobacterium tuberculosis in which the disease is declared (active form) and mammals which are infected but asymptomatic for tuberculosis (latent form), and a method for in vitro distinction between mammals presenting an active form of tuberculosis and mammals not infected by M tuberculosis or presenting a latent form of tuberculosis. The present invention also pertains to kits for detection and distinction between infected mammals presenting tuberculosis symptoms and infected mammals with no disease development, and a kit for distinguishing between mammals presenting an active form of tuberculosis and mammals not infected by M. tuberculosis or presenting a latent form of tuberculosis.