In contrast, in a low doseaerosol infection of mice with GFP-expressing H37Rv, we did not detect a differencein surface MHC II expression between infected and non-infected APCs at various timepoints post-infection; we also found that M. tuberculosis-infectedAPCs isolated from the lungs expressed high levels of the costimulatory moleculesCD80 and CD86 [54]. The gene discussed is CD86; the disease is infection.