Taxonomy
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Phylum Actinobacteria, Class Actinobacteria, Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium,
Corynebacterium efficiens Fudou, Jojima, Seto, Yamada, Kimura, Nakamatsu, Hiraishi
and Yamanaka 2002.
Gram-positive club-shaped rods, 0.8-1.1 x 1.0-4.5 µm. Mycolic acids are present.
Nonspore-forming. Nonmotile.
Colonies on nutrient agar are smooth, entire, circular, dull to slightly glistening and
generally yellow. Require biotin for growth. Optimum growth temperature 30-40 ºC;
can grow at 45 ºC. Grow at pH range 7-10, not at 6.5 pH. Grow in 10% NaCl medium.
No growth in 30% glucose medium. Is a glutamic-acid-producing-species.
Facultatively anaerobic.
Isolated from soil and vegetables.
Undetermined.
  1. Fudou R., Jojima Y., Seto A., Yamada K., Kimura E., Nakamatsu T., Hiraishi A. and Yamanaka S., 2002. Corynebacterium efficiens
    sp. nov., a glutamic-acid-producing species from soil and vegetables. IJSEM 52, 1127-1131.
Most biochemical reactions were determined by API Coryne test.

Can assimilate acetate, L-lactate, pyruvate, but not D-lactate or succinate.

Positive results for catalase, nitrate reduction, pyrazinamidase, acid production from: dextrin, fructose, glucose, maltose, mannose &
ribose.

Negative results for alkaline phosphatase, N-acetyl-beta-glucosaminidase, beta-galactosidase, gelatin hydrolysis, oxidase, acid
production from: galactose, glycogen, lactose, mannitol, salicin, starch & xylose.

Variable results for esculin hydrolysis & urease.
Corynebacterium efficiens
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