Nocardia | 合法醫療器材資訊網

Cultureandstaining—NocardiaisagenusofweaklystainingGram-positive,catalase-positive,rod-​shapedbacteria.Itformspartiallyacid-fast ...

Genus of bacteria

Nocardia is a genus of weakly staining Gram-positive, catalase-positive, rod-shaped bacteria. It forms partially acid-fast beaded branching filaments (acting as fungi, but being truly bacteria). It contains a total of 85 species. Some species are nonpathogenic, while others are responsible for nocardiosis.[3] Nocardia species are found worldwide in soil rich in organic matter. In addition, they are oral microflora found in healthy gingiva, as well as periodontal pockets.[4][clarification needed] Most Nocardia infections are acquired by inhalation of the bacteria or through traumatic introduction.

Nocardia colonies have a variable appearance, but most species appear to have aerial hyphae when viewed with a dissecting microscope, particularly when they have been grown ...