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Streptomyces
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Streptomyces griseus
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Streptomyces griseus
Streptomyces griseus Streptomyces griseus bacteria.

Streptomyces

bacterium
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Streptomyces, genus of filamentous bacteria of the family Streptomycetaceae (order Actinomycetales) that includes more than 500 species occurring in soil and water. Many species are important in the decomposition of organic matter in soil, contributing in part to the earthy odour of soil and decaying leaves and to the fertility of soil. Certain species are noted for the production of broad-spectrum antibiotics, chemicals that the bacteria naturally produce to kill or inhibit the growth of other microorganisms.

Streptomyces are characterized as gram-positive aerobic bacteria of complex form. They form a threadlike net called a mycelium that bears chains of spores at maturity. Their branching strands are 0.5 to 1.0 micrometre in diameter.

The antibiotic producers include: S. aureofaciens (yielding chlortetracycline), S. rimosis (oxytetracycline; see tetracycline), S. griseus (streptomycin), S. erythraeus (erythromycin), and S. venezuelae (chloramphenicol).