Amy, I found this article about the dialysis membrane causing a low grade fever. Seems like whatever is causing Otto to feel bad is due to something relating to dialysis itself and something that changed after the transplant. Could the transplant or the drugs the gave him during the transplant process have made him more sensitive to membranes or that did not bother him in the past?Chronic renal hemodialysis patient with post-hemodialysis fever caused by hypersensitivity to the hemodialysis membrane: A case report.http://sciencelinks.jp/j-east/article/200203/000020020301A1028547.phpLow-grade fever is one of the well known complications of chronic hemodialysis therapy. We report the case of a chronic renal hemodialysis patient with post-hemodialysis fever due to dialysis membranes. An 80-year-old woman undergoing hemodialysis for chronic renal failure due to chronic gromerulonephritis had a high-grade fever (39.DEG.C.) after every hemodialysis therapy for about 2 years. In order to discover the origin of the high-grade fever, we administered several drugs and changed some of the hemodialysis conditions. Her high-grade fever was improved only by using a membrane made of Di-acetate (M-170D) and this also relieved her general fatigue. This case led us to conclude that hypersensitivity to the dialysis membrane may be one of the causes of fever of an unknown origin (FUO) after hemodialysis therapy. (author abst.)