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Post-Transplant Events

Active CMV disease does not always correlate with viral load detection

Abstract

The use of quantitative cytomegalovirus (CMV) real-time polymerase chain reaction (RT-PCR) and preemptive ganciclovir therapy is replacing prophylaxis as the management of choice in high-risk patients undergoing stem cell transplantation (SCT). However, there are limited data defining its role in this setting. In the current retrospective single-centre study, quantitative RT-PCR was used to determine CMV in 577 consecutive patients undergoing SCT (172 allogeneic and 405 autologous) over a 5-year period. CMV RT-PCR was performed weekly until cessation of immunosuppression (allogeneic) or for 30 days post-SCT (autologous). Treatment was commenced after two consecutive positive results or a high copy on the first occasion (>1000 copies/ml, >3 log). The overall CMV reactivation rate in patients undergoing allogeneic SCT was 30%, with reactivation observed in 72% of high-risk patients (recipient positive patients). CMV end-organ disease was observed in eight patients (1%); of these, four were CMV RT-PCR negative at the time of diagnosis of end-organ CMV disease, with three remaining negative throughout the course of the disease. CMV-related mortality was recorded in three patients. The current data support a preemptive treatment strategy-based CMV RT-PCR, but indicate that in symptomatic patients, a negative CMV PCR result does not exclude CMV end-organ disease.

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Correspondence to J Ruell.

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Ruell, J., Barnes, C., Mutton, K. et al. Active CMV disease does not always correlate with viral load detection. Bone Marrow Transplant 40, 55–61 (2007). https://doi.org/10.1038/sj.bmt.1705671

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