Hafnia

**Definition:** A genus of straight, gram-negative bacterial rods which are facultatively anaerobic and motile by peritrichous flagella. This genus is found in human and animal feces, soil, water, and dairy products. It is an opportunistic pathogen in humans. (From Bergey's Manual of Determinative Bacteriology, 9th ed)

**Tree numbers:** - B03.440.450.425.375 - B03.660.250.150.280