Blautia (Streptococcus) hansenii
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus hansenii  
Holdeman & Moore 1974. Moved to
Ruminococcus hansenii (Holdeman and Moore 1974) Ezaki et al. 1994, then to Blautia hansenii  
(Holdeman and Moore 1974) Liu et al. 2008.
Gram-positive, 1.6 to 2.3 μm cocci, with rounded or slightly tapered ends, grouped in
pairs or chains of pairs.
Non-hemolytic, 0.5 to 2 mm in diameter, lenticular, and translucent or white
with translucent edges colonies (up to 5 days incubation). Grow at 37 to 45 ºC (no
growth below 25 ºC), strictly anaerobic.
Growth media: Blood agar, BHI agar, Chopped meat medium with 1% glucose,
PYG-MEDIUM (modified).
Isolated from human faeces.
Unknown (none) - human fecal flora.
  1. Holdeman LV & Moore WEC: New genus, Coprococcus, twelve new species, and emended descriptions of four previously
    described species of bacteria from human feces. International Journal of Systematic Bacteriology, 1974, 24, 260-277.
  2. Skerman VB, et al. Approved lists of bacterial names. Int. J. Syst. Bacteriol. 30: 225-420, 1980.
  3. Bergey’s Manual of Determinative Bacteriology, 9th ed., 1994.
  4. Takayuki Ezaki, Na Li, Yasuhiro Hashimoto, Hiroaki Miura, & Hiroyuki Yamamoto: 16s Ribosomal DNA Sequences of Anaerobic
    Cocci and Proposal of Ruminococcus hansenii comb. nov. and Ruminococcus productus comb. nov. International Journal of
    Systematic Bacteriology, Jan. 1994, p. 130-136.
  5. Lillian V. Holdeman and W. E. C. Moore: New Genus, Coprococcus, Twelve New Species, and Emended Descriptions of Four
    Previously Described Species of Bacteria from Human Feces. INTERNATIONAL JOURNAL of SYSTEMATIC BACTERIOLOGY April
    1974, p. 260-277
Acid is produced from glucose, lactose & raffinose; not produced from inulin, ribose,
sorbitol, trehalose & salicin.
Hydrolysis of hippurate, starch, lecithinase &  growth with 6.5% NaCl are negative.
Voges-Proskauer & hydrolysis of esculin are variable
(c) Costin Stoica
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