NCIt definition : A species of facultatively anaerobic, Gram positive, cocci shaped bacteria in the
phylum Firmicutes. This species is nonmotile, nonsporulating, catalase and oxidase
negative and produces lactic acid from glucose fermentation. A. defectiva is normally
a commensal organism in the oral, genitourinary, and intestinal floras but may become
pathogenic in response to underlying disease.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Abiotrophia defectiva.;