Cultural characteristics
Biochemical characters
Phylum Actinobacteria, Class Actinobacteria, Order Micrococcales, Family Micrococcaceae, Genus Pseudoglutamicibacter,
Pseudoglutamicibacter cumminsii
(Funke, Hutson, Bernard, Pfyffer, Wauters and Collins, 1997) Busse 2016.

Historical synonyms: CDC coryneform group B-1; CDC coryneform group B-3;
Arthrobacter cumminsii Funke, Hutson, Bernard,
Pfyffer, Wauters and Collins 1997 emend. Funke , Pagano-Niederer, Sjὂden and Falsen 1998.
Gram-positive coryneform bacteria without irregular branching, mainly coccoid cells
after 72 h of incubation. Nonmotile. Spores are not produced.
Colonies are slightly convex, smooth, creamy or sticky consistency, whitish-grayish,
up to 2 mm in diameter and slightly glistening after 24 h of incubation at 37 ºC in 5%
2 atmosphere on 5% sheep blood Columbia agar. Obligate aerobic. Does not
express a cheese-like smell, as observed  for the phenotypically closely related
brevibacteria. CAMP test  negative.
Isolated from human clinical specimens (urinary tract infections, skin infections, otitis, blood culture, infected amniotic fluid).
The MICs of penicillin are low and aminoglycosides and quinolones show weak activities; susceptible to glycopeptide antibiotics.
Isolated from urinary tract infections, skin infections, otitis, blood culture, infected amniotic fluid.
  1. Funke G., von Graevenitz A., Clarridge III J.E., and Bernard K.A., 1997. Clinical Microbiology of Coryneform Bacteria. Clinical
    Microbiology Rewiews Vol. 10, No. 1, p. 125-159.
  2. 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.
  3. Funke G., Hutson R.A., Bernard K.A., Pfyffer G.E., Wauters G., and Collins M.D., 1996. Isolation of Arthrobacter spp. from Clinical
    Specimens and Description of Arthrobacter cumminsii sp. nov. and Arthrobacter woluwensis sp. nov.  J. Clin. Micobiol.  Vol. 34,
    No. 10, p. 2356-2363.
  4. Funke G., Pagano-Niederer M., Sjὂden B. and Falsen E., 1998. Characteristics of Arthrobacter cumminsii, the Most Frequently
    Encountered Arthrobacter Species in Human Clinical Specimens. J. Clin. Microbiol. Vol. 36, No. 6, p. 1539-1543.
  5. Busse H.J., 2016. Review of the taxonomy of the genus Arthrobacter, emendation of the genus Arthrobacter sensu lato, proposal
    to reclassify selected species of the genus Arthrobacter in the novel genera Glutamicibacter gen. nov., Paeniglutamicibacter gen.
    nov., Pseudoglutamicibacter gen. nov., Paenarthrobacter gen. nov. and Pseudarthrobacter gen. nov., and emended description of
    Arthrobacter roseus. IJSEM 66, 9-37.
Oxidative metabolism.

Positive results for acid phosphatase, catalase, esterase (C4), esterase lipase (C8), DNA hydrolysis (in 10 days), gelatin hydrolysis
(in 7-10 days), leucine arylamidase, phosphoamidase, acid production from ribose.

Negative results for chymotrypsin, esculin hydrolysis, alpha-fucosidase, alpha- and beta-galactosidase, beta-glucuronidase, alpha-
and beta-glucosidase, N-acetyl-glucosamidase, nitrate reduction, alpha-mannosidase, acid production from: glycogen, lactose,
maltose, sucrose, mannitol & xylose

Variable results for alkaline phosphatase (weak reaction), cystine arylamidase, pyrazinamidase, pyrrolidonyl arylamidase, urease,  
acid production from glucose.
Pseudoglutamicibacter cumminsii
(c) Costin Stoica
Culture media
Biochemical tests
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