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Taxonomy Family: Prevotellaceae Natural habitats Belong to the normal flora of the oropharynx, gastrointestinal tract, the genitals and urinary tract. Clinical significance Prevotella species are among the dominating microorganisms of the oral cavity, where they, despite their commensalism, can be involved in nearly all types of oral infections. They are found in the mouth, pleural-, lung- and other infections and they are typical polymicrobial infections
History Leptotrichia was among the first microorganisms described and probably recognized by van Leeuwenhoek already in 1683. Taxonomy Family: Leptotrichiaceae Natural habitats Leptotrichia colonize the oral cavity and genitourinary tract. These anaerobic bacteria belong to the normal flora of humans and are seldom found in the clinically significant specimens. Clinical significance On rare occasions, Leptotrichia has been isolated from blood cultures of patients with lesions in the oral mucosa, in particular from patients with neutropenia. These organisms should be considered potential pathogens in neutropenic patients, especially when breaks in the mucosal barriers are present through which they frequently spread to the bloodstream.
Taxonomy Family: Prevotellaceae Genus: Seggatella oris Formely: Prevotella oris Natural habitats Belong to the normal flora of the oropharynx, gastrointestinal tract, the genitals and urinary tract. Clinical significance Prevotella species are among the dominating microorganisms of the oral cavity, where they, despite their commensalism, can be involved in nearly all types of oral infections. They are found in the mouth, pleural-, lung- and other infections and they are typical polymicrobial infections
C. ureolyticus is phenotypically close to C. gracilis They are actually microaerophilic rather than obligates anaerobes. Taxonomy Family: Bacteroidaceae Formerly: Bacteroides ureolyticus Natural habitats They are part of the flora of the mouth. Clinical significance Isolated from patients with infections of the lung, neck, abdomen, oral cavity, urogenital, bone and tissue.
