The frequency of CD1b-expressing cells in lungs of infected animals was increased at day 30 of infection compared to day 14 (P < 0.001), where there were a mean of 11.8% ± 2.8% CD1b+ cells in the infected lung, compared to 9.4% ± 5.3% CD1b+ cells among naïve, uninfected guinea pigs. Here, CD1B is linked to infection.