A gram-negative gliding bacterium isolated from the oral cavity. It is a pathogen often causing PERIODONTITIS.

A family of gram-negative, gliding bacteria in the order Cytophagales, class Cytophagia. They are found in SOIL and SEA WATER.

Infections caused by bacteria that show up as pink (negative) when treated by the gram-staining method.

"Bites and stings refer to tissue damage or toxic reactions caused by the teeth, mouthparts, or venomous secretions of animals such as insects, spiders, snakes, and mammals during predatory or defensive attacks."

The oval-shaped oral cavity located at the apex of the digestive tract and consisting of two parts: the vestibule and the oral cavity proper.

A genus of gram-negative, anaerobic, rod-shaped bacteria. Its organisms are normal inhabitants of the oral, respiratory, intestinal, and urogenital cavities of humans, animals, and insects. Some species may be pathogenic.

A film that attaches to teeth, often causing DENTAL CARIES and GINGIVITIS. It is composed of MUCINS, secreted from salivary glands, and microorganisms.

A genus of PASTEURELLACEAE described as gram-negative, nonsporeforming, nonmotile, facultative anaerobes. Most members are found both as pathogens and commensal organisms in the respiratory, alimentary, and genital tracts of animals.

Pathological processes involving the PERIODONTIUM including the gum (GINGIVA), the alveolar bone (ALVEOLAR PROCESS), the DENTAL CEMENTUM, and the PERIODONTAL LIGAMENT.

Inflammation and loss of connective tissues supporting or surrounding the teeth. This may involve any part of the PERIODONTIUM. Periodontitis is currently classified by disease progression (CHRONIC PERIODONTITIS; AGGRESSIVE PERIODONTITIS) instead of age of onset. (From 1999 International Workshop for a Classification of Periodontal Diseases and Conditions, American Academy of Periodontology)

A serine protease found in the azurophil granules of NEUTROPHILS. It has an enzyme specificity similar to that of chymotrypsin C.

Organic esters or salts of sulfonic acid derivatives containing an aliphatic hydrocarbon radical.