Phylum Actinobacteria, Class Actinobacteria, Subclass Actibacteridae, Order Actynomycetales, Suborder Actinomycinae, Family
Actinomycetaceae, Genus Actinomyces, Actinomyces cardiffensis Hall, Collins, Hutson, Falsen, and Duerden 2002.
Gram-positive pleomorphic, slender, straight to curved rods; beaded branching
filaments occur. Non-motile. Non-spore-forming.
Colonies are pinpoint, convex, smooth, entire-edged, opaque cream to pinkish on
Fastidious Anaerobic Agar with 5% horse blood after 48 h of incubation. Facultative
Isolated from human clinical specimens. Habitat is not known.
Isolated from human pleural fluid, brain, jaw, pericolic and ear abscesses.
- Hall V., Collins M.D., Hutson R., Falsen E., and Duerden B.I., 2002. Actinomyces cardiffensis sp. nov. from Human Clinical
Sources. Journal of Clinical Microbiology, Vol. 40, No. 9, 3427-3431.
Description is based mostly on API CORYNE (0/10101/321), API rapid 32S, API rapid
ID32A results. Non-acid-fast.
Positive results for arginine dihydrolase, alpha-glucosidase, leucine arylamidase, acid production from: glucose & sucrose.
Negative results for alkaline phosphatase, catalase, esculin hydrolysis, alpha-fucosidase, alpha-galactosidase, beta-galactosidase,
beta-glucosidase, beta-glucuronidase, N-acetyl-beta-glucosaminidase, gelatin hydrolysis, hippurate hydrolysis, indole production,
lipase C14, alpha-mannosidase, pyrazinamidase, pyrrolidonyl arylamidase, starch hydrolysis, urease, Voges-Proskauer test, acid
production from: amygdalin, L-arabinose, D-arabitol, cellobiose, cyclodextrin, glycogen, methyl-beta-D-glucopyranoside,
N-acetyl-beta-glucosamine, lactose, mannitol, melibiose, melezitose, pullulan, salicin, sorbitol, tagatose, trehalose & D-xylose.
Variable results for nitrate reduction, acid production from: maltose, mannose, raffinose & ribose.
(c) Costin Stoica