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. 2005 Aug 1;106(3):1130-2.
doi: 10.1182/blood-2004-12-4988. Epub 2005 Apr 21.

BK DNA viral load in plasma: evidence for an association with hemorrhagic cystitis in allogeneic hematopoietic cell transplant recipients

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BK DNA viral load in plasma: evidence for an association with hemorrhagic cystitis in allogeneic hematopoietic cell transplant recipients

Veronique Erard et al. Blood. .

Abstract

We performed a case-control study to determine the association of BK plasma viremia with hemorrhagic cystitis (HC) in hematopoietic cell transplant (HCT) recipients. Thirty cases of HC (14 of which occurred after platelet engraftment with documented BK viruria [BK-HC]) were compared with matched controls. Weekly plasma samples were tested for BK virus DNA by polymerase chain reaction (PCR). BK viremia detected before or during the disease was independently associated with HC (adjusted odds ratio = 30, P < .001); BK viremia was even important before clinical symptoms of HC occurred (odds ratio = 11, P < .001). Cases of HC and BK-HC had a significantly higher peak of BK plasma viral load than controls. BK virus was detected by in situ hybridization in bladder biopsies of 2 cases with severe HC and long-lasting BK viremia. BK virus seems to play a role in the development of HC and quantitative detection of BK DNA in plasma appears to be a marker of BK virus disease in HCT recipients.

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Figures

Figure 1.
Figure 1.
Proportion of patients and controls with BK viremia. (A) The proportion of patients among controls and cases in each subset of HC who developed BK viremia at any level before or during HC. Post-eng indicates postengraftment. (B) The proportion of patients among controls and cases in each subset of HC who developed BK viremia above 104 copies/mL. The sensitivity and the specificity of PCR-based BK viremia at any level either before or at time of HC was 86% and 75%, respectively, for clinical HC, and 92% and 72%, respectively, for postengraftment HC with documented BK viruria. The sensitivity and the specificity of BK viremia before HC was 66% and 85%, respectively, for clinical HC, and 92% and 88%, respectively, for postengraftment HC with documented BK viruria. Plasma BK viral load that measured above 104 copies/mL before or during HC had a sensitivity and specificity of 63% and 95%, respectively, for diagnosing HC; and 57% and 95%, respectively, for diagnosing postengraftment HC with documented BK viruria.

References

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