Coloured scanning electron micrograph (SEM) of Streptomyces rimosus, Gram-positive, aerobic, filamentous, rod prokaryote (bacterium). Streptomyces sp. belongs to the Actinomycetes group and are bacteria that share many characteristics with fungi. They grow usually as filaments (chains of cells) and often branch to form a network of filaments (mycelium) in the soil. These soil bacteria are responsible for the musty odour of soil. Streptomyces rimosus is notably the most characterized industrial streptomycete producer of oxytetracycline and other tetracycline antibiotics. Although resistance to these antibiotics has reduced their clinical use in recent years, tetracyclines have an increasing role in the treatment of emerging infections and non-infective diseases. Magnification: x2,400 when shortest axis printed at 25 millimetres.
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