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. 2021 Feb 18;19:18. doi: 10.1186/s12969-021-00505-5

Fig. 4.

Fig. 4

P. acnes detected by PAB antibody within the sarcoid granulomas of biopsied skin lesion. Hematoxylin and eosin stain and IHC with PAB antibody and LAM antibody as control are shown pairwise. a Noncaseating epithelioid cell granulomas in the dermis. b Higher magnification of the granuloma indicated by an arrow in (a). c No positive signal detected by LAM antibody in the identical granuloma. d Many round bodies detected by PAB antibody in the granuloma (arrows). Scale bar; 50 µm.

IHC, immunohistochemistry; PAB, Propionibacterium acnes-specific monoclonal; LAM, mycobacteria-specific monoclonal