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.
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.
Isolated from soil and vegetables.
- 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 &
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.
(c) Costin Stoica