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Phylum Actinobacteria, Class Actinobacteria , Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium,
Corynebacterium thomssenii  Zimmermann, Sproer, Kroppenstedt, Fuchs, Kochel and
Funke 1998.

Description is based on a single isolate.
Gram-positive diphtheroids. Nonspore-forming. Nonmotile.
Fastidious slow-growing bacterium. Colonies are whitish, circular, mucoid and sticky;
they are less than 0.5 mm in diameter after 24 h of incubation at 37 ºC in air and  in a
5% C0
2 -enriched atmosphere on sheep blood Columbia agar. CAMP test is negative.
Isolated from pleural fluids of a human patient with chronic renal failure, stroke and pneumonia.
This is a very rarely encountered species.
Susceptible to penicillin G, ampicillin, cefazoline, gentamicin, erythromycin, clindamycin, tetracycline,  ciprofloxacin, chloramphenicol,
rifampicin and vancomycin. Resistant to oxacillin, cefetamet, ceftibuten, and fosfomycin.
Undetermined.
  1. 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.
  2. Zimmermann O., Sproer C., Kroppenstedt R.M., Fuchs E., Kochel G. and Funke G., 1998. Corynebacterium thomssenii sp. nov, a
    Corynebacterium with N-acetyl-β-glucosaminidase activity from human clinical specimens. IJSB 48, 489-494.
Fermentative metabolism.
Most biochemical characters were tested on API Coryne, API 50CH, and API ZYM.

Positive results for N-acetyl-beta-glucosaminidase (strong activity), acid phosphatase, alkaline phosphatase, catalase, cystine
arylamidase, DNase-activity, esterase (C4), esterase lipase (C8), pyrazinamidase, urease, acid production from: fructose, glucose,
5-ketogluconate, maltose, mannose, sucrose & trehalose.

Negative results for chymotrypsin activity, esculin hydrolysis, lipophilism, nitrate reduction, tyrosine hydrolysis, acid production from:
N-acetylglucosamine, adonitol, amygdalin, D- and L-arabinose, arabitol, arbutin, cellobiose, dulcitol, erythritol, beta-gentiobiose,
gluconate, 2-ketogluconate, glycerol, glycogen, inositol, inulin, lyxose, mannitol, melezitose, melibiose, raffinose, rhamnose, salicin,
sorbitol, sorbose, xylitol & xylose.
Corynebacterium thomssenii
(c) Costin Stoica
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