Necrotising fasciitis caused by P aeruginosa in a male patient with chronic lymphocytic leukaemia.

A 53-year-old man with chronic lymphocytic leukaemia and multiple comorbidities presented with a 2-day history of increasing pain and swelling in his left leg following a minor trauma, associated with signs of systemic sepsis and worsening multiorgan failure. The clinical picture was consistent with necrotising fasciitis and he was taken to the theatre for an above-knee amputation. Blood and tissue cultures grew Pseudomonas aeruginosa only, which is very rare as a monomicrobial infection, with relatively few cases being reported in the literature.