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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 ...
Actinomycosis is a rare infectious bacterial disease caused by the gram-positive Actinomyces species. [1] The name refers to ray-like appearance of the organisms in the granules. About 70% of infections are due to either Actinomyces israelii or A. gerencseriae. [1] Infection can also be caused by Streptomyces somaliensis and Propionibacterium ...
Actinomyces israelii is a species of Gram-positive, rod-shaped bacteria within the genus Actinomyces. Known to live commensally on and within humans, A. israelii is an opportunistic pathogen and a cause of actinomycosis .
Actinomyces bovis is a branching, Gram-positive, rod-shaped bacterium of the genus Actinomyces. [1] It is the causative agent of lumpy jaw in cattle, and occasionally causes actinomycosis infections in humans. [ 3 ]
Actinomycetota-derived antibiotics that are important in medicine include aminoglycosides, anthracyclines, chloramphenicol, macrolide, tetracyclines, etc. [citation needed] Actinomycetota have high guanine and cytosine content in their DNA. [21] The G+C content of Actinomycetota can be as high as 70%, though some may have a low G+C content. [22]
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.
Multiple-week antibiotic therapies have cured actinomycotic infections caused by A. viscosus in every recorded case. [1] Therapies include treatment with penicillin, sulfadimethoxine, flucloxacillin, clindamycin, tetracycline, and ticarcillin. [1] A. viscosus is usually resistant to vancomycin, metronidazole, cefalexin, and dicloxacillin. [1]
Streptomyces antibioticus was discovered by Selman Waksman and H. Boyd Woodruff, who named the bacterium Actinomyces antibioticus. [2] In their 1941 publication, Waksman and Woodruff describe their use of the "bacterial-agar plate method", in which they mixed a suspension of E. coli with washed agar containing 1.5% NaCl and 0.5% K 3 PO 4. [2]