A nurse is caring for a client who is receiving peritoneal dialysis for kidney failure. Which additional condition in the client's medical history puts the client at increased risk for the development of peritonitis?

A. Ulcerative colitis affects the colon but does not directly increase the risk of peritonitis in peritoneal dialysis patients. B. Hemochromatosis is a metabolic disorder and is not linked to increased peritonitis risk. C. Diabetes impairs immune function and wound healing, increasing susceptibility to infections, including peritonitis in peritoneal dialysis clients. D. Obesity may complicate dialysis but is not a direct risk factor for peritonitis.