streptococcus


streptococcus
streptococcal /strep'teuh kok"euhl/, streptococcic /strep'teuh kok"sik/, adj.
/strep'teuh kok"euhs/, n., pl. streptococci /-kok"suy, -see/. Bacteriol.
any of several spherical or oval bacteria of the genus Streptococcus, occurring in pairs or chains, certain species of which are pathogenic for humans, causing scarlet fever, tonsillitis, etc.
[1875-80; < NL; see STREPTO-, COCCUS]

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Any of the spheroidal bacteria that make up the genus Streptococcus.

The cells characteristically group together in chains resembling a string of beads. Streptococci are gram-positive (see gram stain) and stationary and do not require oxygen. Some species cause infections, including rheumatic fever, scarlet fever, strep throat, and tonsillitis. Others are used in commercial starters for the production of butter, cultured buttermilk, and certain cheeses. See also pneumococcus.

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 group of spheroidal bacteria belonging to the family Streptococcaceae. The term streptococcus (“twisted berry”) refers to the bacteria's characteristic grouping in chains that resemble a string of beads. Streptococci are microbiologically characterized as gram-positive and nonmotile.

 Streptococcus contains a variety of species, some of which cause disease in humans and animals, while others are important in the manufacture of certain fermented products. Streptococcus pyogenes, often referred to as group A streptococcus bacteria, can cause rheumatic fever, impetigo, scarlet fever, puerperal fever, streptococcal toxic shock syndrome, strep throat, tonsillitis, and other upper respiratory infections. necrotizing fasciitis, a rapidly spreading infection of the skin and underlying tissue caused by S. pyogenes, has been popularly referred to as the “flesh-eating disease.” Streptococcus agalactiae, or group B streptococcus bacteria, can cause infections of the bladder and uterus in pregnant women; in newborn infants infection with the bacterium may result in sepsis (blood poisoning), meningitis (inflammation of the membranes covering the brain and spinal cord), or pneumonia. Streptococcus pneumoniae (pneumococcus), also called pneumococcus, is an important human pathogen that causes pneumonia, sinusitis, otitis media, and meningitis. Fecal (enterococcal) species occur in great numbers in the bowel and can cause urinary tract infections and endocarditis. S. mutans, belonging to the viridans species, inhabits the mouth and contributes to tooth decay. Among the lactic species, S. lactis and S. cremoris are used in commercial starters for the production (dairy product) of butter, cultured buttermilk, and certain cheeses.

      Streptococci generally are classified by the type of carbohydrate contained in the cell wall, a system called the Lancefield classification.

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Universalium. 2010.

Look at other dictionaries:

  • Streptococcus — pneumoniae Systematik Domäne: Bakterien Abteilung …   Deutsch Wikipedia

  • Streptococcus — ? Streptococcus Научная классификация Царство: Бактерии Тип: Класс: Bacilli …   Википедия

  • Streptococcus — género de cocos grampositivos inmóviles, clasificados por tipos serológicos (grupos de Lancefield de A a T), por su acción hemolítica (alfa, beta, gamma) cuando crecen en agar sangre y por su reacción a virus bacterianos (fagotipos 1 a 86).… …   Diccionario médico

  • streptococcus — [strep΄tə käk′əs] n. pl. streptococci [strep΄təkäk′sī΄] [ModL < Gr streptos, twisted (see STREPTOMYCES) + COCCUS] any of a genus (Streptococcus) of spherical, Gram positive bacteria that divide in only one plane and occur generally in chains:… …   English World dictionary

  • Streptococcus — Strep to*coc cus, n.; pl. {Streptococci}. [NL., fr. Gr. ? pliant, curved + ? a grain, seed.] (Biol.) A long or short chain of micrococci, more or less curved. [1913 Webster] [1913 Webster] [1913 Webster] …   The Collaborative International Dictionary of English

  • Streptococcus — См. Стрептококки (Источник: «Словарь терминов микробиологии») …   Словарь микробиологии

  • Streptococcus — Billroth, Gattung der Kugelbakterien, runde Zellen ohne Bewegungsorgane, die sich nur nach einer Richtung des Raumes teilen. Nach der Teilung bilden die Zellen, indem sie sich voneinander trennen, perlschnurartige Ketten. S. erysipelatos… …   Meyers Großes Konversations-Lexikon

  • Streptocóccus — Streptocóccus, runde Bakterienformen (Kokken, s. Kokkus), die sich ketten oder perlschnurartig aneinanderreihen (Kettenkokken [Tafel: Bakterien, 1]) …   Kleines Konversations-Lexikon

  • Streptococcus — vgl. Streptokokke …   Das Wörterbuch medizinischer Fachausdrücke

  • streptococcus — (n.) bacteria genus, 1877, Modern Latin, coined by Viennese surgeon Albert Theodor Billroth (1829 1894) from Gk. streptos twisted + Mod.L. coccus spherical bacterium, from Gk. kokkos berry. So called because the bacteria usually form chains …   Etymology dictionary

  • streptococcus — ► NOUN (pl. streptococci) ▪ a bacterium of a large genus including those causing scarlet fever, pneumonia, souring of milk, and dental decay. DERIVATIVES streptococcal adjective. ORIGIN from Greek streptos twisted …   English terms dictionary


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