is the name proposed for the organism previously known as “yellow-pigmented .” The type strain (holotype) of this species is ATCC 29544. The proposed change in the classification of this organism is based on differences between and in deoxyribonucleic acid (DNA)-DNA hybridization, biochemical reactions, pigment production, and antibiotic susceptibility. By DNA hybridization, was about 50% related to (“” biotype b), and “” (“” biotype a). The new species was placed in rather than because of its closer phenotypic and DNA similarity to , the type species of the genus , and because it was only 41% related by DNA hybridization to , the type species of had biochemical reactions very similar to those of but was -sorbitol negative and positive for extracellular deoxyribonuclease at 2 to 7 days and produced yellow-pigmented colonies. had larger zones of inhibition around ampicillin and cephalothin antibiotic disks, which also helps to differentiate it from grew on the nonselective (but differential) plating media commonly used in enteric bacteriology, but its plating efficiency was reduced on more inhibitory enteric plating media. It has been isolated from human clinical specimens such as sputum, feces, and wounds, where it is probably only a colonizer and not clinically significant. However, it is also a documented, although rare, cause of neonatal meningitis. Other sources have included food, a physician's stethoscope, and an uninoculated blood culture bottle.


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