Electron microscopy of cultured vesicular forms of spirochaetes derived from acute ulcerative gingivitis.
D001419:Bacteria / Q000166:cytology*; D005892:Gingivitis, Necrotizing Ulcerative / Q000382:microbiology*; D006801:Humans; D008854:Microscopy, Electron; D013144:Spirochaetales / Q000166:cytology