Phylum Actinobacteria, Class Actinobacteria, Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium, Corynebacterium sundsvallense Collins, Bernard, Hutson, Sjoden, Nyberg and Falsen
Gram stains show characteristic bulges or knobs at the ends of some rods;
Gram-positive polymorphic coryneform rods. Nonspore-forming. Nonmotile. Mycolic
acids are present. Tuberculostearic acid is not present.
Colonies are buff or slightly yellowish and adherent to agar , with a sticky consistency,
opaque, shiny, and heaped. Haemolysis and CAMP test are negative. Growth in 6.5%
NaCl is variable. No growth in 10% NaCl.
It is infrequently encountered in human clinical material. Sensitive to penicillin and vancomycin.
- Funke G., 2006. Corynebacteria and rare coryneforms. In: Topley & Wilson’s Microbiology & Microbial Infections, 10th Edition,
Edited by Borriello S.P., Murray P.R. and Funke G., Edward Arnold (Publishers) Ltd., Bacteriology, volume 2.
- Collins M.D., Bernard K.A., Hutson R.A., Sjöden B., Nyberg A. and Falsen E., 1999. Corynebacterium sundsvallense sp. nov., from
human clinical specimens. IJSB 49, 361-366.
Most biochemical characters were tested on API Coryne and API ZYM.
Positive results for catalase, alpha-glucosidase, hippurate hydrolysis, urease, acid production from: fructose, glucose, maltose &
Negative results for acid phosphatase, esculin hydrolysis, gelatin hydrolysis, lipophilism, nitrate reduction, oxidase, starch hydrolysis,
acid production (slowly) from: N-acetylglucosamine, amygdalin, galactose, glycogen, lactose, mannitol, raffinose, ribose, salicin,
trehalose & xylose.
Variable results for alkaline phosphatase.
(c) Costin Stoica