[An unusual germ causing a limp: Eikenella corrodens].

A case of retroperitoneal appendicular abscess due to Eikenella corrodens is reported. This facultative anaerobe is normally found on the respiratory and intestinal mucosa and may be responsible for opportunistic infections. Culture is difficult and growth is slow. There have been few previous reports of the localization reported herein. A limp was the first manifestation of the infection. The differential diagnosis and pathophysiology of this symptom are discussed.