Ganciclovir Prophylaxis of Cytomegalovirus Infection and Disease in Allogeneic Bone Marrow Transplant Recipients: Results of a Placebo-Controlled, Double-Blind Trial

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ObjectiveTo evaluate the efficacy and safety of ganciclovir for prevention of cytomegalovirus (CMV) infection and disease.DesignA randomized, placebo-controlled, double-blind trial.SettingUniversity-affiliated bone marrow transplant center.PatientsCytomegalovirus-seropositive allogeneic bone marrow transplant recipients.InterventionsRandom assignment to receive either a placebo or ganciclovir at a dose of 2.5 mg/kg body weight every 8 hours for 1 week before transplant and then at a dose of 6 mg/kg once per day, Monday through Friday, after transplant when the post-transplant neutrophil count reached 1.0 x 109/L.MeasurementsCytomegalovirus infection (positive culture, seroconversion, positive histologic findings), CMV disease (pneumonia, gastroenteritis, the wasting syndrome), and study-drug toxicity.ResultsCytomegalovirus infection developed in 25 of 45 placebo patients (56%) but in only 8 of 40 ganciclovir patients (20%) (P < 0.001). Cytomegalovirus disease may also have occurred less often in the ganciclovir patients (4 of 40 patients (10%) versus 11 of 45 patients (24%); P = 0.09). The probability of CMV disease occurring within the first 120 days after transplantation was 0.29 among the placebo patients but only 0.12 among ganciclovir patients (P = 0.06). Reversible neutropenia was the only appreciable toxicity related to ganciclovir and required interruption of the study drug after transplant in 25 of 43 ganciclovir patients (58%) and in 13 of 47 placebo patients (28%) (P = 0.005). Overall survival was similar in both the placebo patients (29 of 45 (64%)) and ganciclovir patients (28 of 40 (70%); P > 0.2).ConclusionsProphylactic ganciclovir, started before transplant and continued after recovery of the post-transplant neutrophil count, reduces the incidence and severity of CMV infection in CMV-seropositive bone marrow transplant recipients but is frequently associated with neutropenia.

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