title: Chronic inflammation in the gingival tissue of germ-free dogs.
mesh_terms: D000818:Animals; D002908:Chronic Disease; D003238:Connective Tissue / Q000473:pathology; D004285:Dogs; D004848:Epithelium; D005856:Germ-Free Life; D005891:Gingivitis / Q000473:pathology*; D008214:Lymphocytes; D010950:Plasma Cells; D013194:Staining and Labeling