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Prevotella species may be commensal in the vagina, though increased abundance of Prevotella in vaginal mucosa is associated with bacterial vaginosis.A study of 542 Korean women, including identical and fraternal twins, highlighted that the vaginal microbiota's composition is influenced by menopausal status and bacterial vaginosis, with Lactobacillus and Prevotella being the most inheritable ...
Prevotella intermedia (formerly Bacteroides intermedius) is a gram-negative, obligate anaerobic pathogenic bacterium involved in periodontal infections, including gingivitis and periodontitis, and often found in acute necrotizing ulcerative gingivitis. It is commonly isolated from dental abscesses, where obligate anaerobes predominate.
Examples of obligately anaerobic bacterial genera include Actinomyces, Bacteroides, Clostridium, Fusobacterium, Peptostreptococcus, Porphyromonas, Prevotella, Propionibacterium, and Veillonella. Clostridium species are endospore-forming bacteria, and can survive in atmospheric concentrations of oxygen in this dormant form. The remaining ...
The anaerobes often isolated from brain abscesses complicating respiratory and dental infections are anaerobic Gram-negative bacilli (AGNB, including Prevotella, Porphyromonas, Bacteroides), Fusobacterium and Peptostreptococcus spp. Microaerophilic and other streptococci are also often isolated.
Prevotella melaninogenica is a species of bacterium in the normal microbiota of the upper respiratory tract. It is an important human pathogen in various anaerobic infections, often mixed with other aerobic and anaerobic bacteria. [2] P. melaninogenica is an anaerobic, Gram-negative rod, named for its black colonies, and black pigment.
Since they are anaerobes, members of Prevotellaceae can live in areas where there is little to no oxygen – such as the guts of mammals. [3] [4] As of January 2024 Prevotellaceae is split into 10 valid genera: Alloprevotella, Hallella, Hoylesella, Leyella, Palleniella, Paraprevotella, Prevotella, Pseudoprevotella, Segatella, Xylanibacter. [5]
Prevotella bivia is a species of bacteria in the genus Prevotella.It is gram-negative.It is one cause of pelvic inflammatory disease. [1]Other Prevotella spp. are members of the oral and vaginal microbiota, and are recovered from anaerobic infections of the respiratory tract.
Anaerobic gram-positive cocci such as Peptostreptococcus are the second most frequently recovered anaerobes and account for approximately one quarter of anaerobic isolates found. Most often anaerobic gram-positive cocci are usually recovered mixed in with other anaerobic or aerobic bacteria from various infections at different sites of the ...