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Actinomyces species may form endospores, and while individual bacteria are rod-shaped, Actinomyces colonies form fungus-like branched networks of hyphae. [3] The aspect of these colonies initially led to the incorrect assumption that the organism was a fungus and to the name Actinomyces, "ray fungus" (from Greek actis, ray or beam, and mykes ...
The Actinomycetaceae (often called actinomycetes or mycelial bacteria) are a family of bacteria in the order Actinomycetales that contains the medically important genus Actinomyces. These organisms are closely related to the mycobacteria, but were originally classified as fungi because they were thought to be transitional forms between bacteria ...
Actinomycetales can be found mostly in soil and decaying organic matter, as well as in living organisms such as humans and animals. They form symbiotic nitrogen fixing associations with over 200 species of plants, and can also serve as growth promoting or biocontrol agents, or cause disease in some species of plants.
The Actinomycetota (or Actinobacteria) are a diverse phylum of Gram-positive bacteria with high GC content. [4] They can be terrestrial or aquatic. [5] They are of great importance to land flora because of their contributions to soil systems.
Scanning electron micrograph of Actinomyces israelii. Scientific classification; Domain: Bacteria: Phylum: Actinomycetota: Class: Actinomycetia (Stackebrandt et al. 1997) Salam et al. 2020 [1] Type genus; Actinomyces
Schaalia turicensis (formerly Actinomyces turicensis) is a Gram-positive bacterium found in the flora of the oral cavity, gut, skin, and female urogenital tract. [2] S. turicensis is an important human pathogen of soft tissue infections in the lower body. [3] S. turicensis is a facultative anaerobe, growing in air and CO 2 conditions.
Actinomyces and its associated species have, for a long time, been implicated in human infections, particularly those of the mouth, pharynx, distal esophagus, and genitourinary tract. [9] Within the last 10 years, A. massiliensis has been detected in blood, and most Actinomyces bacteremias stem from oral sources. [ 9 ]
Actinomyces radicidentis is a species in the genus Actinomyces, first isolated from infected root canals of teeth. Once characterized, it has since been found to be present in failed root canal treatments. [ 3 ]