title: A microbiological and biochemical study of gingival crevice debris obtained from Guatemalan Mayan Indians.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003773:Dental Plaque / Q000201:enzymology* / Q000382:microbiology*; D005122:Exudates and Transudates / Q000032:analysis; D005881:Gingiva / Q000382:microbiology*; D006166:Guatemala; D006801:Humans; D006859:Hydrogen / Q000032:analysis; D007198:Indians, North American; D003012:Microbial Collagenase / Q000032:analysis; D008875:Middle Aged; D010447:Peptide Hydrolases / Q000032:analysis; D010510:Periodontal Diseases / Q000209:etiology; D013440:Sulfides / Q000032:analysis
chemical_list: D013440:Sulfides; D006859:Hydrogen; D010447:Peptide Hydrolases; D003012:Microbial Collagenase