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

Figure 5

Immunohistochemistry with a P. acnes-specific monoclonal antibody (PAB antibody) that reacts with cell-membrane-bound lipoteichoic acid of the bacterium. Many small round bodies are shown within a noncaseating epithelioid cell granuloma of sarcoid lymph node.