Background: With the introduction of prolonged prophylaxis with valganciclovir in cytomegalovirus (CMV) donor/recipient serodiscordance (D+/R-) patients, concerns about a high incidence of late and invasive CMV disease associated with mortality have emerged. We compared the characteristics of CMV disease in D+/R- patients receiving prolonged valganciclovir prophylaxis with R+ patients.
Methods: We prospectively followed all solid organ transplant recipients from January 2004 to December 2005. CMV prophylaxis with valganciclovir or ganciclovir was administered as follows: donor- recipient serodiscordance (D+/R-), 12 weeks; induction with antithymocyte globulin or acute rejection episodes requiring steroid pulses, 15 to 30 days; and CMV R+ double kidney-pancreas, 15 days. Transplant characteristics and the development of CMV disease variables were collected for all patients. We defined 2 groups according to the risk of CMV disease: CMV donor/recipient mismatch (D+/R-) and recipient CMV-positive (R+) groups.
Results: During the study period we performed 481 solid organ transplantations: 237 kidney, 34 kidney-pancreas, 157 liver, 38 heart, 13 liver-kidney, and 2 heart-kidney. Overall, 36 patients developed CMV disease (7.5%). CMV donor-recipient mismatch (D+/R-) was associated with a greater risk of CMV disease compared with CMV-positive recipients (16% vs 7%; P = .036). Prophylaxis against CMV was longer in the D+/R- group (mean days 73 vs 15; P < .001). CMV disease appeared later in the D+/R- than in R+ group (mean days 123 vs 59; P < .001). We observed a trend toward a lower incidence of tissue-invasive CMV disease among the D+/R- group compared with the R+ group without significance (14% vs 41%; P = .382). Three patients died in the first 30 days after the onset of CMV disease, all of them in the R+ group.
Conclusions: In our setting, high-risk patients (D+/R-) receiving prolonged prophylaxis with valganciclovir developed later CMV disease, but this was neither more tissue-invasive nor more life-threatening than in the R+ group.
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