Phylum Actinobacteria, Class Actinobacteria , Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium, Corynebacterium striatum (Chester 1901) Eberson 1918.
Historical synonym: Bacterium striatum Chester 1901.
Nonmotile, pleomorphic Gram-positive rods, often club shaped, 0.25-0.5 x 2.0-3.0 µm.
Metachromatic granules are present.
Whitish colonies, moist and smooth (like those of small coagulase-negative
staphylococci); grow well on sheep blood agar. The colonies may be small initially but
in 2-3 days they are greater than 2 mm in diameter. Brown pigment (possibly
melanin) is produced on tyrosine-supplemented medium. Finely granular white
sediment appear in broth with clear supernatant and no pellicle. CAMP test is
variable. Slight hemolysis around deep colonies. Aerobic growth.
Occur in the normal flora on both skin and oropharynx; is difficult to distinguish infection from contamination or colonization. Also
isolated from milk of cows with mastitis.
Susceptible to penicillin G and O/129. Might be resistant to macrolides, clindamycin, tetracyclines and quinolones.
There is not much documentation linking it unambiguously with infections. There are infections involve colonization of indwelling
protheses, catheter tips, ventilator tubes, feeding tubes, previous chronic wounds (draining elbow sinus, finger granuloma) and the
conjunctiva. May be involved in endocarditis, pacemaker-related endocarditis, bacteremia, respiratory tract infections.
Pathogen to guinea pigs and mice.
- 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.
- 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.
- Cummins C.S., Lelliott R.A. and Rogosa M., 1975. Genus Corynebacterium Lehmann and Neumann 1896 . In: Buchanan R.E.
and Gibbons N.E. (Editors), Bergey’s Manual of Determinative Bacteriology, Eight Edition, The Williams & Wilkins Company,
- Diaconescu A. si Damian M., 2009. Identificarea corinebacteriilor. In: Buiuc D., Negut M. (Editori), Tratat de Microbiologie Clinica,
Editia a III-a, Editura Medicala, Bucuresti, 620-651.
- Coyle M.B., Leonard R.B. and Nowowiejski, 1993. Pursuit of the Corynebacterium striatum type strain. IJSB Vol. 43, No. 4, p.848-
Positive results for alkaline phosphatase, catalase, hippurate hydrolysis, methyl red, nitrate reduction, pyrazinamidase, tyrosine
hydrolysis, acid production from: dextrin, fructose, glucose, glycogen, maltose & mannose.
Negative results for casein hydrolysis, esculin hydrolysis, indole production, lipophilism, urease, Voges-Proskauer, acid production
from: arabinose, mannitol, raffinose, rhamnose, salicin & xylose.
Variable results for gelatinase, acid production from: galactose, lactose, maltose, starch, sucrose & trehalose.
(c) Costin Stoica