Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Clostridia, Order Clostridiales, Family Clostridiaceae, Genus Clostridium, Cluster I (Clostridium sensu
stricto),
Clostridium psychrophilum  Spring, Merkhoffer, Weiss, Kroppenstedt, Hippe and Stackebrandt 2003.
Gram-positive rods, 1.0-1.4 x 2.5-8.0 µm, occurring singly, in pairs or in short chains;
filamentous cells are frequently present in agar grown cultures. Motile by peritrichous
flagella. Spores are ellipsoidal, subterminal or terminal, not swelling the sporangium.
Colonies on sheep-blood agar are 1-2 mm in diameter, round with often coarsely
granulated margins, smooth, slightly raised, cream-white to grayish, semi-
transparent to opaque and nonhemolytic.

Psychrophilic, optimum temperature for growth is 4 ºC; upper limit is10 ºC.
Optimum pH 6.5-7.0, range 5.5-7.5. The fermentation products formed are butyrate,  
ethanol, lactate, 1-butanol,
hydrogen, and carbon dioxide.
Isolated from a microbial mat sample taken from a moated area around Lake Fryxell, Antarctica.
Undetermined.
  1. N.A. Logan and P. De Vos, 2009. Genus I. Clostridium Prazmowski 1880. In: (Eds.) P.D. Vos, G. Garrity, D. Jones, N.R. Krieg, W.
    Ludwig, F.A. Rainey, K.-H. Schleifer, W.B. Whitman. Bergey’s Manual of Systematic Bacteriology, Volume 3: The Firmicutes,
    Springer, 738-828.
  2. Spring S., Merkhoffer B., Weiss N., Kroppenstedt R. M., Hippe H. and Stackebrandt E., 2003. Characterization of novel
    psychrophilic clostridia from an Antarctic microbial mat: description of Clostridium frigoris sp. nov., Clostridium lacusfryxellense
    sp. nov., Clostridium bowmanii sp. nov. and Clostridium psychrophilum sp. nov. and reclassification of Clostridium laramiense as
    Clostridium estertheticum subsp. laramiense subsp. nov. IJSEM 53, 1019-1029.
Positive results for hydrogen production, substrate utilization and/or acid production from: arabinose, cellobiose, fructose, glucose,
inulin, maltose, mannose, sucrose, trehalose & xylose.

Negative results for gelatin hydrolysis, starch hydrolysis, substrate utilization and/or acid production from: amygdalin, galactose,
glycogen, inositol, lactose, mannitol, melezitose, melibiose, raffinose, rhamnose, ribose, salicin, sorbitol & starch.
Clostridium psychrophilum
(c) Costin Stoica
Antibiogram
Encyclopedia
Culture media
Biochemical tests
Stainings
Images
Movies
Articles
Identification
Software
R E G N U M
PROKARYOTAE
Previous page
Back