Figure 1.

Quantitative PCR for mycobacterial and propionibacterial DNA in sarcoid lymph nodes. Lymph node samples from each of the 15 patients with sarcoidosis (Sar), tuberculosis (Tbc), and gastric cancer (Cont) were used in this study. The horizontal dotted lines show the detection threshold and samples with results below this line are considered negative. Samples without P. acnes detected (as indicated by dotted squares) all contained many P. granulosum (reproduced from Ishige et al. [15] with permission from the Lancet, London).