| Streptococcus parvulus (Lancefieldella parvula) |
- J. G.Holt et al., 1994. Begey’s manual of Determinative Bacteriology, 9-edition, Williams & Wilkins.
- Cato E.P.: Transfer of Peptostreptococcus parvulus (Weinberg, Nativelle, and Prévot 1937) Smith 1957 to the genus
Streptococcus: Streptococcus parvulus (Weinberg, Nativelle, and Prévot 1937) comb. nov., nom. rev., emend. Int. J. Syst. Bacteriol.,
1983, 33, 82-84. - Olsen I., Johnson J.L., Moore L.V.H. & Moore W.E.C.: Lactobacillus uli sp. nov. and Lactobacillus rimae sp. nov. from the human
gingival crevice and emended descriptions of Lactobacillus minutus and Streptococcus parvulus. Int. J. Syst. Bacteriol., 1991, 41,
261-266. - Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-
Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacillota (Firmicutes), Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus
parvulus (Weinberg et al. 1937) Cato 1983. Moved to Atopobium parvulum Collins and Wallbanks 1993. According to Nouioui et al.
2018 Atopobium parvulum belongs to genus Lancefieldella as Lancefieldella parvula (Weinberg et al. 1937) Nouioui et al. 2018.
Old synonyms: Peptostreptococcus parvulus (Weinberg et al. 1937) Smith 1957; "Not Streptococcus parvulus" Levinthal 1928;
Streptococcus parvulus non liquefaciens Repaci 1910).
parvulus (Weinberg et al. 1937) Cato 1983. Moved to Atopobium parvulum Collins and Wallbanks 1993. According to Nouioui et al.
2018 Atopobium parvulum belongs to genus Lancefieldella as Lancefieldella parvula (Weinberg et al. 1937) Nouioui et al. 2018.
Old synonyms: Peptostreptococcus parvulus (Weinberg et al. 1937) Smith 1957; "Not Streptococcus parvulus" Levinthal 1928;
Streptococcus parvulus non liquefaciens Repaci 1910).
Gram-positive, 0.3-0.4 μm, nonmotile, nonspore-forming cocci, occurring in short
chains or occasionally in pairs.
chains or occasionally in pairs.
Nonhemolytic, small, 1.0 mm in diameter, circular, entire, transparent, grayish, slightly
peaked colonies. May become black.
Strictly anaerobic, optimal growth at 37.0 ºC. Can grow at 45 ºC but not at 10 ºC.
Growth inhibited in the presence of 20% bile or 6.5% NaCl. Culture media: Brain heart
infusion blood agar. Growth stimulated by the addition of 0.02% Tween 80.
peaked colonies. May become black.
Strictly anaerobic, optimal growth at 37.0 ºC. Can grow at 45 ºC but not at 10 ºC.
Growth inhibited in the presence of 20% bile or 6.5% NaCl. Culture media: Brain heart
infusion blood agar. Growth stimulated by the addition of 0.02% Tween 80.
Isolated from human respiratory tract and mouth (gingival crevices).
May be a cause of pulmonary gangrene, tonsillitis, sinusitis, otitis, and dental and thoracic abscesses.
Acid is produced from cellobiose, esculin, fructose, galactose, glucose, inulin, lactose, maltose, mannose, salicin, sucrose and
trehalose.
Acid is not produced from amygdalin, arabinose, glycerol, glycogen, inositol, mannitol, melezitose, melibiose, pectin, raffinose,
rhamnose, ribose, sorbitol and starch.
Esculin hydrolysis is positive.
Starch hydrolysis, hippurate hydrolysis, nitrates reduction, gelatin liquefaction, catalase, H2S production and indole production are
negative.
Erythritol and xylose are weakly fermented.
trehalose.
Acid is not produced from amygdalin, arabinose, glycerol, glycogen, inositol, mannitol, melezitose, melibiose, pectin, raffinose,
rhamnose, ribose, sorbitol and starch.
Esculin hydrolysis is positive.
Starch hydrolysis, hippurate hydrolysis, nitrates reduction, gelatin liquefaction, catalase, H2S production and indole production are
negative.
Erythritol and xylose are weakly fermented.
(c) Costin Stoica
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