NCIt definition : A species of aerobic, Gram-positive, rod shaped bacteria assigned to the phylum Actinobacteria.
This species is catalase and urease positive, acid-fast, hydrolyzes esculin but not
casein, reduces nitrate, and characteristically produces a mycelium that fragments
into bacillary and coccoid elements. N. asteroides is naturally found in soil, ans
lake and marine sediment where it digests plant matter; but in humans it is an opportunistic
pathogen and one of the causative agents of nocardiosis in immunocompromised individuals.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Nocardia asteroides.;