General Information: Isolation: Human gingival crevice; Temp: Mesophile; Temp: 37C. The bacteria are nonmotile, Gram-positive rods that occur singly, in pairs, and in short chains; the central part of the cell may swell particularly when grown on solid medium. This strain is microaerotolerant to anaerobic and grows optimally at 37 degrees Celsius. Olsenella uli (formerly Lactobacillus uli) has been isolated from human gingival crevices and periodontal pockets.