A 73-year-old man, Elmer W., reported to his physician with complaints of fever, nausea, and abdominal pain and tenderness of 2 days duration. Elmer was a chronic diabetic with end-stage renal disease. His diabetes was being regulated with insulin injections and diet. His kidney disease was being treated with continuous ambulatory peritoneal dialysis (CAPD). On examination, Elmer was tachycardic and had a temperature of 103.6°F. Before dialysis, blood was drawn for CBC, routine chemistry analysis, and culture. A sample of CAPD fluid was also collected for routine culture and sensitivity testing. On examination in the laboratory, the CAPD fluid appeared turbid, and the initial Gram's stain revealed many neutrophils and numerous gram-negative bacilli. After overnight incubation, the SBA plate showed large, spreading, gray colonies. Blood culture showed no growth after 5 days. Biochemical results from the organism isolated from the CAPD fluid are shown below: Glucose = positive Nitrate = positive Lysine decarboxylase = negative Lactose = positive VP = positive Arginine dihydrolase = positive Motility = positive Indole = negative Ornithine decarboxylase = positive DNase = negative Urea = positive Phenylalanine deaminase = negative TSI = A/A no H2S Citrate = positive Oxidase = negative