| Actinomyces radicidentis |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinomycetota, Class Actinomycetes, Order Actynomycetales, Suborder Actinomycinae, Family Actinomycetaceae, Genus
Actinomyces, Actinomyces radicidentis Collins, Hoyles, Kalfas, Sundquist, Monsen,
Nikolaitchouk and Falsen, 2000.
Actinomyces, Actinomyces radicidentis Collins, Hoyles, Kalfas, Sundquist, Monsen,
Nikolaitchouk and Falsen, 2000.
Gram-positive coccoid cells. Non-motile. Non-spore-forming. Non-acid-fast.
Facultative anaerobic. Grows on Columbia blood agar at 37 ºC in 48 h.
Isolated from infected root canals of human teeth; habitat is unknown.
Isolated from infected root canals of human teeth.
- Collins MD, Hoyles L, Kalfas S, Sundquist, Monsen T, Nikolaitchouk N, and Falsen E, 2003. Characterisation of Actinomyces
isolates from infected root canals of teeth: description of Actinomyces radicidentis sp. nov. J Clin Microbiol. 38, 9, 3399-3403.
Description is based on API Rapid ID32 Strep, API ZYM and API Coryne results.
Positive results for acid phosphatase, catalase, esculin hydrolysis, gelatin hydrolysis
(weak reaction), alpha- and beta-galactosidase, alpha- and beta-glucosidase,
beta-galacturonidase, leucine arylamidase, pyrazinamidase, Voges-Proskauer test, acid production from D-glucose, lactose,
maltose, mannitol, melibiose, melezitose, ribose, methyl-beta-D-glucopyranoside, raffinose, sucrose and trehalose.
Negative results for alkaline phosphatase, arginine dihydrolase, ester lipase C8, alpha-fucosidase, beta-glucuronidase,
N-acetyl-beta-glucosaminidase, hippurate hydrolysis, lipase C14, alpha-mannosidase, trypsin, chymotrypsin, acid production from
L-arabinose, D-arabitol, cyclodextrin, glycogen, pullulan, sorbitol and tagatose.
Variable results for nitrate reduction and urease.
Positive results for acid phosphatase, catalase, esculin hydrolysis, gelatin hydrolysis
(weak reaction), alpha- and beta-galactosidase, alpha- and beta-glucosidase,
beta-galacturonidase, leucine arylamidase, pyrazinamidase, Voges-Proskauer test, acid production from D-glucose, lactose,
maltose, mannitol, melibiose, melezitose, ribose, methyl-beta-D-glucopyranoside, raffinose, sucrose and trehalose.
Negative results for alkaline phosphatase, arginine dihydrolase, ester lipase C8, alpha-fucosidase, beta-glucuronidase,
N-acetyl-beta-glucosaminidase, hippurate hydrolysis, lipase C14, alpha-mannosidase, trypsin, chymotrypsin, acid production from
L-arabinose, D-arabitol, cyclodextrin, glycogen, pullulan, sorbitol and tagatose.
Variable results for nitrate reduction and urease.
(c) Costin Stoica
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