title: Further study of ultrathin sections of Treponema pallidum under the electron microscope.
mesh_terms: D000818:Animals; D002455:Cell Division; D002462:Cell Membrane; D002473:Cell Wall; D003593:Cytoplasm; D006801:Humans; D008854:Microscopy, Electron; D008867:Microtomy; D011817:Rabbits; D014210:Treponema pallidum / Q000166:cytology* / Q000254:growth & development