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Streptomyces is the largest genus of Actinomycetota, and the type genus of the family Streptomycetaceae. [3] Over 700 species of Streptomyces bacteria have been described. [ 4 ] [ 5 ] [ 6 ] As with the other Actinomycetota, streptomycetes are gram-positive , and have very large genomes with high GC content .
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 propionicus. The condition is likely to be a polymicrobial anaerobic infection. [2]
Streptomyces antibioticus (previously known as Actinomyces antibioticus) is a gram-positive bacterium discovered in 1941 by Nobel-prize-winner Selman Waksman and H. Boyd Woodruff. [ 1 ] [ 2 ] Its name is derived from the Greek "strepto-" meaning "twisted", alluding to this genus ' chain-like spore production, [ 3 ] and " antibioticus ...
The environment present in the human mouth allows the growth of characteristic microorganisms found there. It provides a source of water and nutrients, as well as a moderate temperature. [ 2 ] Resident microbes of the mouth adhere to the teeth and gums to resist mechanical flushing from the mouth to stomach where acid-sensitive microbes are ...
Actinomyces is a genus of the Actinomycetia class of bacteria.They all are Gram-positive and facultatively anaerobic, growing best under anaerobic conditions. [2] Actinomyces species may form endospores, and while individual bacteria are rod-shaped, Actinomyces colonies form fungus-like branched networks of hyphae. [3]
Streptococcus salivarius is a species of spherical, gram-positive, facultative anaerobic lactic acid bacteria [1] that is both catalase and oxidase negative. S. salivarius colonizes (usually in chains) the oral cavity and upper respiratory tract of humans just a few hours after birth, making further exposure to the bacteria harmless in most circumstances.
"In Situ Detection of Antibiotic Amphotericin B Produced in Streptomyces nodosus Using Raman Microspectroscopy". Marine Drugs. 12 (5): 2827– 39. doi: 10.3390/md12052827. PMC 4052319. PMID 24828290. Pereia, Tanya (September 2008). "Community structure and antibiotic production of Streptomyces nodosus bioreactors cultured in liquid environments".
The following is a list of Streptomyces species, organized alphabetically by species name. [1] Names that have not been validated according to the Bacteriological Code are enclosed in "quotes". As of June 2021 [update] , there are 679 valid species of Streptomyces and an additional 121 provisional species. [ 1 ]