A Rare Case of Joint Infection due to .

, a gram-negative bacterium, first emerged in late 1900s as . It was later classified as genus in 2001. This nonmotile rod is usually found in soil and aquatic environment. There are two known species of : and . They are responsible for numerous yet rare infections including cystitis, pneumonia, and bacteremia. To date, only one case of joint or bone infection due to has been reported. The infection is eradicated after arthroscopic lavage and antibiotic therapy with fluoroquinolones. We present the first case of septic arthritis due to involving a native knee joint following synovectomy during arthroscopy.