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Streptococcus Anginosus
''Streptococcus anginosus'' is a species of ''Streptococcus ''Streptococcus'' is a genus of gram-positive ' (plural ) or spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. Cell division in streptococci occurs ...''. This species, '' Streptococcus intermedius'', and '' Streptococcus constellatus'' constitute the ''anginosus'' group, which is sometimes also referred to as the ''milleri'' group after the previously assumed but later refuted idea of a single species ''Streptococcus milleri''. Phylogenetic relatedness of ''S. anginosus, S. constellatus, and S. intermedius'' has been confirmed by rRNA sequence analysis. General characteristics The majority of ''Streptococcus anginosus'' strains produce acetoin from glucose, ferment lactose, trehalose, salicin, and sucrose, and hydrolyze esculin and arginine. Carbon dioxide can stimulate growth or is even required for growth in certain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Streptococcus
''Streptococcus'' is a genus of gram-positive ' (plural ) or spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. Cell division in streptococci occurs along a single axis, so as they grow, they tend to form pairs or chains that may appear bent or twisted. This differs from staphylococci, which divide along multiple axes, thereby generating irregular, grape-like clusters of cells. Most streptococci are oxidase-negative and catalase-negative, and many are facultative anaerobes (capable of growth both aerobically and anaerobically). The term was coined in 1877 by Viennese surgeon Albert Theodor Billroth (1829–1894), by combining the prefix "strepto-" (from ), together with the suffix "-coccus" (from Modern , from .) In 1984, many bacteria formerly grouped in the genus ''Streptococcus'' were separated out into the genera ''Enterococcus'' and ''Lactococcus''. Currently, over 50 species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Streptococcus Intermedius
''Streptococcus intermedius'' is an aerotolerant anaerobic commensal bacterium and a member of the ''Streptococcus anginosus'' group. The ''S. anginosus'' group, occasionally termed “''Streptococcus milleri'' group” (SMG) display hemolytic and serologic diversity, yet share core physiological traits. Despite being commensal organisms, members of the ''S. anginosus'' group display wide pathogenic potential. ''S. intermedius'' has been isolated from patients with periodontitis and fatal purulent infections, especially brain and liver abscesses.Claridge, J. E., III, S. Attorri, D. M. Musher, J. Hebert, and S. Dunbar. 2001. ''Streptococcus intermedius'', ''Streptococcus constellatus'', and Streptococcus ''anginosus'' (“''Streptococcus milleri'' group”) are of different clinical importance and are not equally associated with abscess. Clin. Infect. Dis. 32:1511–1515.Whiley, R. A., D. Beighton, T. G. Winstanley, H. Y. Fraser, and J. M. Hardie. 1992. ''Streptococcus intermedius ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Streptococcus Constellatus
''Streptococcus constellatus'' is a species of ''Streptococcus'' that is part of the normal flora in the oral cavity, urogenital region, and intestinal tract. However, it can frequently cause purulent infections in other parts of the body. DNA homology studies and 16S rRNA sequence analysis demonstrate ''S. constellatus'' belongs to the Streptococcus anginosus group (milleri group) along with ''Streptococcus intermedius'' and ''Streptococcus anginosus.'' Morphology ''S. constellatus'' are gram positive, non-sporing, non-motile, catalase negative cocci. The cells are small, normally 0.5-1μm in diameter and form short chains. Their cell wall peptidoglycan is composed of Lys-Ala1-3 and has a DNA G+C content of 37-38%.Whiley, R. A., Hall, L. M. C., Hardie, J. M., Beighton, D. A study of small-colony, -haemolytic, Lancefield group C streptococci within the anginosus group: description of Streptococcus constellatus subsp. pharyngis subsp. nov., associated with the human throat and phar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Streptococcus Anginosus Group
The ''Streptococcus anginosus'' group (SAG), also known as the anginosus group streptococci (AGS) or the milleri group streptococci (MGS), are a group of several species of streptococci with clinical similarities. The group is named after a principal member species, '' Streptococcus anginosus''. The older name ''Streptococcus milleri'' (as well as ''Streptococcus milleri'' group, SMG) is now pseudotaxonomic, as the idea that these streptococci constituted a single species was incorrect. The anginosus group streptococci are members of the viridans streptococci group. They have been implicated as etiologic agents in a variety of serious purulent infections, but because of their heterogeneous characteristics, these organisms may be unrecognized or misidentified by clinical laboratorians. The unique characteristic of them from other pathogenic streptococci, such as ''S. pyogenes'' and ''S. agalactiae'', is their ability to cause abscesses. Species Members include: * '' Streptococcus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacteremia
Bloodstream infections (BSIs), which include bacteremias when the infections are bacterial and fungemias when the infections are fungal, are infections present in the blood. Blood is normally a sterile environment, so the detection of microbes in the blood (most commonly accomplished by blood cultures) is always abnormal. A bloodstream infection is different from sepsis, which is the host response to bacteria. Bacteria can enter the bloodstream as a severe complication of infections (like pneumonia or meningitis), during surgery (especially when involving mucous membranes such as the gastrointestinal tract), or due to catheters and other foreign bodies entering the arteries or veins (including during intravenous drug abuse). Transient bacteremia can result after dental procedures or brushing of teeth. Bacteremia can have several important health consequences. The immune response to the bacteria can cause sepsis and septic shock, which has a high mortality rate. Bacteria c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Streptococcaceae
Streptococcaceae are a family of Gram-positive bacteria, placed within the order Lactobacillales. Representative genera include ''Lactococcus'', ''Lactovum'', and ''Streptococcus ''Streptococcus'' is a genus of gram-positive ' (plural ) or spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. Cell division in streptococci occurs ...''. References Lactobacillales Bacteria families {{lactobacilli-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
