One Year of Preemptive Valganciclovir Administration in Children After Liver Transplantation.

Valganciclovir (VGCV) is used as prophylaxis against cytomegalovirus (CMV) infection after pediatric living donor liver transplantation (LDLT). The purpose of this study was to examine the efficacy of 1 year of preemptive VGCV administration compared with a shorter administration after pediatric LDLT. VGCV was administered to 56 children who underwent LDLT. CMV and Epstein-Barr virus (EBV) antibody status, pp65 antigenemia, and other laboratory data were assessed at 1 year after LDLT. Patients were divided into the 1-year group (n = 32) (patients who had 1 year of VGCV administration) and the <1-year group (n = 24) (patients who had less than 1 year of VGCV administration). Study participants consisted of 34 females and 22 males, with a mean age of 4.2 years at transplant. Regarding pretransplant donor (D)/recipient (R) CMV antibody status, 13 were D positive (+)/R negative (-), 27 were D+/R+, 8 were D-/R+, and 8 were D-/R-. For EBV, 22 were D+/R+, 32 were D+/R-, and 2 were D-/R-. In the 1-year group, only 2 patients (6.5%) developed CMV infection, whereas 8 patients (33.3%) developed CMV infection in the <1-year group. The CMV pp65 antigenemia assay was positive in 2 patients. CMV IgM was positive in 7 patients. One year of preemptive VGCV administration was associated with a lower incidence of CMV infection (P = .008), but not EBV infection. No adverse effects were observed. One year of preemptive VGCV administration after LDLT is safe and suppresses CMV infection. It was useful after pediatric LDLT.

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