CD1C and tuberculosis: In contrast, studies that found higher T cell responses in latent or active patients, including studies reporting IFN-γ release after stimulation with CD1b-MA (15), CD1b-GMM (14), CD1b-sulfoglycolipid (17), CD1c-phosphomycoketide (13), and CD1b-glycerol monomycolate (18), generally used “uninfected” controls that did not come from a household with a TB case or high exposure community.