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Sixty-nine of 347 recipients had a positive screening test for BKV infection. Twenty-nine patients underwent biopsy, and 11 were diagnosed with PVAN. Sensitivity rates of urine EM and plasma PCR were 88% and 100%, respectively. Specificity rates of urine EM and plasma PCR were http://www.selleckchem.com/products/rgfp966.html 91% and 78%. There was no statistical difference in the operating characteristics of the two tests. The majority of both plasma PCR and urine EM tests were positive in the six?months prior to a diagnostic biopsy confirming PVAN. In those patients who had evidence of BKV infection but did not have PVAN, the percentage of positive screening tests decreased with aggressive lowering of immunosuppression. We conclude that urine EM and plasma PCR both function well in screening for BKV infection and in the diagnosis of PVAN. There is an opportunity to detect viral replication, lower immunosuppression, and to prevent PVAN in this population. ""Hiwarkar P, Shaw BE, Tredger JM, Brown NW, Kulkarni S, Saso R, Evans S, Treleaven J, Davies FE, Ethell ME, Morgan GJ, Potter MN. Mycophenolic acid trough level monitoring: relevance in acute and chronic graft versus host disease and its relation with albumin. Clin Transplant 2011: 25: 222�C227. ? 2010 John Wiley & Sons A/S. Abstract:? Mycophenolate mofetil (MMF) is used to treat acute and chronic graft versus host disease (GvHD). There is scant evidence in the literature about mycophenolic acid (MPA) trough level monitoring in GvHD. We therefore reviewed 32 patients treated with MMF for acute (n?=?19) or chronic GvHD (n?=?13). Twelve (63%) of 19 patients with acute GvHD and nine (69%) of 13 with chronic GvHD showed a good response. In all 21 patients who responded to MMF, their mean total MPA levels were therapeutic (1�C3.5?mg/L), whereas five of 11 patients who did not respond had sub-therapeutic mean MPA levels (p?=?0.002). Sixteen (66%) of 24 steroid refractory or dependent patients responded to MMF. Associations between the mean total MPA level for each patient and the corresponding mean serum albumin concentration showed therapeutic mean total MPA levels for all 23 patients with mean albumin ��31?g/L but sub-therapeutic mean total MPA levels in five of nine patients with mean albumin