Abstract
The distinctive properties of an Alcaligenes-like organism isolated from human pathological material are described. The organism is readily recognizable by its characteristic colonial appearances, fruity smell and greening of blood agar. It resembles to a considerable extent Alcaligenes faecalis, ‘Bacterium alcali-aromaticum’, and A. odorans; the name A. odorans var. viridans is proposed for the organism. It appears to be non-pathogenic, but may be confused with Pseudomonas aeruginosa.