title: An electron microscopic study of a syphilitic chancre. Engulfment of Treponema pallidum by plasma cells.
mesh_terms: D000917:Antibody Formation; D000937:Antigen-Antibody Reactions; D001706:Biopsy; D003238:Connective Tissue / Q000473:pathology*; D003593:Cytoplasm; D006801:Humans; D007136:Immunoglobulins / Q000378:metabolism; D008297:Male; D008854:Microscopy, Electron; D010413:Penis / Q000473:pathology; D010950:Plasma Cells; D013587:Syphilis / Q000473:pathology*; D014210:Treponema pallidum / Q000302:isolation & purification*
chemical_list: D007136:Immunoglobulins