Neisseria elongata osteomyelitis: Literature review and case report in a 63-year-old male presenting with progressive right-handed redness, swelling and pain.

Neisseria elongata, a gram-negative rod, has been identified in 23 cases of pathogenesis in the literature, of which only 2 were osteomyelitis. Here we report the third known case of isolated N. elongata cultures in a digital osteomyelitis. A 63-year-old male with peripheral vascular disease and lower extremity wounds presented to his vascular surgeon with right-handed redness and pain requiring urgent surgical intervention. Irrigation, debridement, and partial thumb amputation were performed, followed by treatment with a 6-week course of antibiotics. N. elongata is a rare cause of osteomyelitis and unfamiliarity with the causal organism and rod-like morphology may delay diagnosis and treatment. Gram-negative coverage should be considered in high-risk populations with cellulitis to prevent progression to fulminant abscesses, suppurative tenosynovitis and osteomyelitis.

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