Etiologic Aspect of Sarcoidosis as an Allergic Endogenous Infection Caused by Propionibacterium acnes

Figure 6

Many small round bodies detected by the PAB antibody are shown intermingled with many lymphocytes in one immature granuloma (A), but only a few are observed in the mature granuloma (B) of the sarcoid lymph node. Most of the P. acnes are present within the granuloma, but some are present outside of the granuloma (as indicated by the arrow).