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Phylum Actinobacteria, Class Actinobacteria, Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium,
Corynebacterium coyleae Funke, Ramos and Collins 1997.
Gram-positive diphtheroid cells. Nonmotile. Nonspore-forming.
Colonies are whitish, slightly glistening, convex, creamy or sticky consistency and 1
mm in diameter after 24 h of incubation at 37 ºC on sheep blood Columbia agar in a
5% CO
2-enriched atmosphere. Strong CAMP reaction. Weak anaerobic  growth.
Isolated from cultures of blood and other normally sterile body fluids (pleural fluid) of immunocompromised patients, and from
genitourinary specimens.
Susceptible to amoxicillin-clavulanic acid, ampicillin, ceftriaxone, cefuroxime, cephalothin, chloramphenicol, ciprofloxacin, erythromycin,
gentamicin, imipenem, oxacillin, penicillin G, rifampin, teicoplanin, tetracycline, and vancomycin.
The clinical significance is not known.
  1. Funke G., Ramos C.P. and Collins M.D., 1997. Corynebacterium coyleae sp. nov., isolated from human clinical specimens. IJSB
    Vol. 47, No.1, 92-96.
  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.
Fermentative metabolism. Non-partially-acid-fast.
Description of most biochemical test is based on API CORYNE, API 50CH & API ZYM.

Positive results for acid phosphatase, alkaline phosphatase, catalase, cystine
arylamidase, esterase (C4), esterase lipase (C8), pyrazinamidase, acid production
from: 5-ketogluconate, glucose (weak), ribose, fructose & mannose.

Negative results for casein hydrolysis, chymotrypsin activity, esculin hydrolysis, lipophilism, nitrate reduction, tyrosine hydrolysis,
urease, xanthine hydrolysis,  acid production from: N-acetylglucosamine, adonitol, amygdalin, arabinose, arabitol, arbutin, cellobiose,
dulcitol, erythritol, fucose, galactose, beta-gentiobiose, gluconate, 2-ketogluconate, glycerol, glycogen, inositol, inulin, lactose, lyxose,
maltose, mannitol, melezitose, melibiose, raffinose, rhamnose, salicin, sorbitol, sorbose, starch, sucrose, tagatose, trehalose,
turanose, xylitol & xylose.
Corynebacterium coyleae
(c) Costin Stoica
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