Actinomyces

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Actinomyces

 [ak″tĭ-no-mi´sēz]
a genus of gram-negative, non–acid fast, nonmotile bacteria that form branched filaments. It includes A. israe´lii and A. naeslun´dii, both of which cause human actinomycosis and periodontal disease.

actinomyces

 [ak″tĭ-no-mi´sēz]
an organism of the genus Actinomyces. adj., adj actinomycet´ic.

Actinomyces

(ak'ti-nō-mī'sēz),
A genus of slow-growing, nonmotile, nonsporeforming, anaerobic to facultatively anaerobic bacteria (family Actinomycetaceae) containing gram-positive, irregularly staining filaments; diphtheroid cells may be predominant. They exhibit true branching while forming mycelial-type colonies. Most of the species produce a filamentous microcolony. The metabolism of these chemoheterotrophs is fermentative; the products of glucose fermentation include acetic, formic, lactic, and succinic acids but not propionic acid. Actinomyces may have characteristic sulfur granules in purulent drainage. These organisms are pathogenic for humans and other animals and can cause chronic suppurative infection in humans. More than 16 species have been described; type species is Actinomyces bovis.
[actino- + G. mykēs, fungus]

Actinomyces

(ăk′tə-nō-mī′sēz′)
n.
A genus of rod-shaped or filamentous, gram-positive, anaerobic to facultatively anaerobic bacteria commonly found in the mammalian oral cavity, including certain species that are pathogenic, such as the causative agents of actinomycosis.

actinomyces

(ăk-tĭn′ō-mī′sēz, ăk′tə-nō-)
n. pl. actinomyces
Any of various rod-shaped or filamentous, chiefly anaerobic bacteria of the genus Actinomyces, commonly found in the mammalian oral cavity and including pathogenic species, such as the causative agents of actinomycosis.

Actinomyces

A genus of slow-growing, facultatively anaerobic, nonmotile, nonspore-forming, gram-positive bacteria, which form branching, irregularly staining filaments, filamentous microcolonies, and metabolise by fermentation of certain sugars.

Actinomyces

Microbiology A genus of slow-growing, facultatively anaerobic, nonmotile, nonspore-forming, gram-positive bacteria, which form branching, irregularly staining filaments, filamentous microcolonies, and metabolize by fermentation of certain sugars. See Actinomycosis, Sulfur granules. Cf Bacteroides spp, Nocardiaspp.

Ac·ti·no·my·ces

(ak'ti-nō-mī'sēz)
A genus of slow-growing, nonmotile, non-spore-forming, anaerobic to facultatively anaerobic bacteria (family Actinomycetaceae) containing gram-positive, irregularly staining filaments. These organisms can cause chronic suppurative infection in humans. The type species is A. bovis.
[actino- + G. mykēs, fungus]

Ac·ti·no·my·ces

(ak'ti-nō-mī'sēz)
A genus of slow-growing, nonmotile, non-spore-forming, anaerobic to facultatively anaerobic bacteria containing gram-positive, irregularly staining filaments; diphtheroid cells may be predominant. Most species produce a filamentousmicrocolony. May have characteristic sulfur granules in purulent drainage. Pathogenic for humans and other animals and can cause chronic suppurative infection in humans.
[actino- + G. mykēs, fungus]