Figure 3.

Numbers of early secretory antigenic target (ESAT)-6- and culture filtrate protein (CFP)-10–specific (A) peripheral blood lymphocytes and (B) bronchoalveolar lavage lymphocytes per 1,000,000 lymphocytes in individuals suspected to be affected by sputum acid-fast bacilli (AFB) smear-negative pulmonary TB. All individuals shown had positive M. tuberculosis specific enzyme-linked immunospot assay results in the blood, compatible with either latent TB infection or active tuberculosis. Gray bars represent patients with sputum AFB smear-negative pulmonary TB; white bars represent patients with alternative pulmonary diseases. Horizontal lines represent median values; whiskers represent 10th to 90th percentiles.