Case 161. Aeromonas hydrophila infection (50 y-o M)
    Autopsy findings of A. hydrophila septicemia in case of chronic renal failure under CAPD control, manifesting progressive gangrenous cellulitis of the right upper arm (clinical course: 3 days)    
Key words : Aeromonas hydrophila, gangrenous cellulitis
Gross features of lethal necrotizing fasciitis of the right upper arm seen at autopsy (Debridment had been performed). Aeromonas hydrophila was cultured from the lesion. Opportunistic infection may occur in immunosupressed patients.   Vesicles are formed in the necrotic skin (gross findings). A. hydrophila belongs to the family Vibrio, and widely distributes in fresh water and soil. It can grow at low temperature to cause food poisoning.
The epididymis shows clusters of Gram-negative rods around necrotic tissue (HE). Cellular reaction is poor. Similar necrotizing infection foci are seen in the rectum, prostate, liver and kidney.