NCIt definition : A species of anaerobic, Gram positive, rod shaped bacteria assigned to the phylum
Actinobacteria. This bacteria is urease positive, hydrolyzes esculin and does not
produce acid from mannitol. A. naeslundii is a commensal organism of the oral cavity
and colonizes tooth surfaces but may cause infection and periodontal disease in cases
in which oral trauma occurs.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Actinomyces naseslundii.;