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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus anginosus Andrewes & Horder
1906.
Synonyms: Streptococcus milleri Guthof 1956, Streptococcus constellatus (Prévot 1924) Holdeman and Moore 1974, Streptococcus
intermedius Prévot 1925.
The majority of strains belongs to Lancefield group F, some of them to groups A, C & G.
1906.
Synonyms: Streptococcus milleri Guthof 1956, Streptococcus constellatus (Prévot 1924) Holdeman and Moore 1974, Streptococcus
intermedius Prévot 1925.
The majority of strains belongs to Lancefield group F, some of them to groups A, C & G.
Gram positive cocci, non-sporeforming, non-motile, grouped in short chains.
Colonies on blood agar are 0.5 to 2.0 mm in diameter, white or translucent, convex,
and entire; some strains produce colonies that are 0.5 to 1.0 mm in diameter, white,
and matte.
Grow better anaerobically. Growth is reduced under aerobic conditions and is
frequently enhanced by CO2. Some strains require anaerobic conditions for growth.
Most strains give partial hemolysis (alpha).
and entire; some strains produce colonies that are 0.5 to 1.0 mm in diameter, white,
and matte.
Grow better anaerobically. Growth is reduced under aerobic conditions and is
frequently enhanced by CO2. Some strains require anaerobic conditions for growth.
Most strains give partial hemolysis (alpha).
Isolated from the mouth, oropharynx, gastrointestinal tract, vagina & other human and animal clinical samples.
Human and animal infections: various organs abscesses, menigitis, endocarditis, obstetrical infections, dental infections, sinusitis,
bacteremia and neonatal sepsis.
bacteremia and neonatal sepsis.
- Bergey’s Manual of Determinative Bacteriology, 9th ed., 1994.
- Coykendall A.L., Wesbecher P.M. & Gustafson K.B.: "Streptococcus milleri", Streptococcus constellatus, and Streptococcus
intermedius are later synonyms of Streptococcus anginosus. Int. J. Syst. Bacteriol., 1987, 37, 222-228. - Whiley R.A. & Beighton D.: Emended descriptions and recognition of Streptococcus constellatus, Streptococcus intermedius, and
Streptococcus anginosus as distinct species. Int. J. Syst. Bacteriol., 1991, 41, 1-5.
Positive results for acetoin production, alkaline phosphatase, beta-glucosidase,
leucine arylamidase, arginine hydrolysis, esculin hydrolysis, acid production from
trehalose, amygdalin, glucose, cellobiose, lactose, salicin, mannitol, melibiose & raffinose.
Negative fot hippurate hydrolysis, urease, beta-D-fucosidase, beta-galactosidase,
beta-glucuronidase, beta-N-acetylglucosaminidase, pyrrolidonylaminidase, sialidase, acid production from: ribose & glycogen,
arabinose, glycerol, inulin & sorbitol.
Variable results for: alpha-galactosidase, alpha-glucosidase.
leucine arylamidase, arginine hydrolysis, esculin hydrolysis, acid production from
trehalose, amygdalin, glucose, cellobiose, lactose, salicin, mannitol, melibiose & raffinose.
Negative fot hippurate hydrolysis, urease, beta-D-fucosidase, beta-galactosidase,
beta-glucuronidase, beta-N-acetylglucosaminidase, pyrrolidonylaminidase, sialidase, acid production from: ribose & glycogen,
arabinose, glycerol, inulin & sorbitol.
Variable results for: alpha-galactosidase, alpha-glucosidase.
(c) Costin Stoica
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