Porphyromonas

Porphyromonas

(pōr'fir-om'ō-năs),
A genus of small anaerobic gram-negative nonmotile cocci and usually short rods that produce smooth, gray to black pigmented colonies the size of which varies with the species. In humans, they are found as part of the normal flora in the oropharynx, including gingival crevices, and in the vaginal and intestinal tracts. The type species is Porphyromonas asaccharolytica.
Farlex Partner Medical Dictionary © Farlex 2012

Por·phyr·o·mon·as

(pōr-fir-ŏm'ō-năs)
A genus of small, anaerobic, gram-negative, nonmotile, pleomorphic cocci and usually short rods that produce smooth, gray-to-black-pigmented colonies, the size of which varies with the species. In humans, they are found as part of the normal flora in the oropharynx, including gingival crevices, and in the vaginal and intestinal tracts. The type species is P. asaccharolytica.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Porphyromonas

(pōr″ fĭ-rō-mōn′ ăs) [Gr. porphyra, purple + monas, single]
A genus of gram-negative, rod-shaped, anaerobic bacteria that inhabits the oral cavity. One species, Porphyromonas gingivalis, is a common cause of gingivitis and periodontal infection.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
One type of bacteria commonly found in cases of periodontal disease, Porphyromonas gingivalis, has also been found in the brains of patients with Alzheimer's disease.
The trial represents the first large, randomized late-stage clinical study evaluating the gingipain hypothesis, which is based upon growing evidence that the bacterium most commonly associated with chronic periodontal disease, Porphyromonas gingivalis, plays a key role in the development of AD, given its identification in the brains of AD patients and ability to cause neurodegeneration, inflammation, and other pathology associated with Alzheimer's in animal models.
Various herpes viruses and Porphyromonas gingivalis, a bacterium that causes gingivitis, are major contenders.
The formation of biofilm and adherence to oral epithelial cells can be affected negatively by capsaicin on Porphyromonas gingivalis (La et al., 2010; Gerits et al., 2017).
The bacterium, Porphyromonas gingivalis, is the bad actor involved in periodontitis, the most serious form of gum disease.
Gum disease can cause Alzheimer's UNLIKELY Dr David Reynolds, chief scientific officer from Alzheimer's Research UK, said: "While some studies have found higher levels of a bacteria linked to gum disease Porphyromonas gingivalis in the brain during Alzheimer's, it remains unclear what role, if any, it plays.
Dr David Reynolds, chief scientific officer from Alzheimer's Research UK, says: "While some studies have found higher levels of a bacteria linked to gum disease, Porphyromonas gingivalis, in the brain during Alzheimer's, it remains unclear what role, if any, it plays.
Other experiments have produced evidence that one type of bacteria commonly found in cases of periodontitis - Porphyromonas gingivalis - can be found in the brains of individuals with Alzheimer's.
(27,28) A recent study by Wei Zhou et al was the first of its kind to evaluate the effects of melatonin and a melatonin receptor agonist Ramelteon against Porphyromonas gingivalis.
Bowel bacteria such as Proteus mirabilis, Escherichia coli, Mycoplasma, Klebsiella pneumonia and Porphyromonas gingivalis all have a strong link to inflammatory arthritis.
Notably, the abundance of four types of bacteria - low levels of Haemophilus and Porphyromonas and high levels of Leptotrichia and Fusobacterium - could distinguish pancreatic cancer patients from healthy individuals.
Porphyromonas gingivalis is one of the chief causes of gum disease and tooth loss in humans, and has also been associated with artery damage.