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Lung burden of M. tuberculosis H37Rv in mice in the LED and LCD groups at serial time points after inoculation with M. tuberculosis. There are significantly more organisms recovered from the lungs of the LED mice than from the LCD mice at day 28 (*, P < 0.05) and a trend toward a greater burden at day 35 (+, P = 0.06). Error bars indicate standard errors of the means.
