Necrotizing Soft-tissue Infections Caused by Marine Vibrios

Halophilic, noncholera marine Vibrio bacteria can cause septicemia, gastroenteritis, cellulitis, and necrotizing fasciitis. We describe six patients with necrotizing fasciitis and review 12 cases described previously. The 18 patients included 14 men and four women. Their ages ranged from 32 to 79 years (average 58.1 years). Eleven patients were older than 55 years. Nine infections were caused by V. vulnificus, three by V. parahaemolyticus, and one by V. alginolyticus. In five cases the Vibrio species was not identified. Twelve patients had associated conditions that might have made them more susceptible to these infections, such as cirrhosis, steroid therapy, hemochromatosis, and multiple myeloma. These infections usually occur in apparently insignificant wounds (puncture wounds, insect bites) exposed to sea water or fish. Treatment is by debridement and antibiotic therapy. Three patients required amputation to control the infection. Six (33.3%) of the 18 patients died.