|Etymology:||Genus name: Greek actino ray, mykes fungus (referring to the radiating appearance of microcolonies).
Species epithet: sticky.
|Significance:||[Of minor importance]|
|Type Strain:||ATCC 15987 = CCUG 14476 = NCTC 10951|
|Macromorphology (smell):||Medium sized, round, white and viscous kolonies (O.5-5 mm in diameter).|
|Micromorphology:||Small bent and nonmotile rods (diameter: 0.2-1.0 µm), sometimes branching filaments up to 50 µm|
|Gram +/Gram -:||G+|
|Metabolism:||Facultatively anaerobic, but needs 10% CO2 to grow anaerobically.|
|Other Enzymes:||DNase -, tryptophanase -, urease V|
|Biochemical Tests:||Methyl red +, Voges-Proskauer -|
|Fermentation of carbohydrates:||
|16S rRNA Seq.:|
||The genus Actinomyces is composed of about 40 species, which are related to the genera Actinobaculum and Trueperella.|
|Comment:||The species definition has been changed and it is only strains belonging to the former serovar I that should be regarded as A. viscosus.|