Background: Cytomegalovirus (CMV) is a common opportunistic infection in patients after liver transplant (LT). Guidelines recommend 900 mg daily of valganciclovir; however, valganciclovir commonly causes dose-dependent hematologic toxicities. Use of a low-dose valganciclovir (450 mg) has been used to prevent these adverse effects, but the data regarding this dosing strategy are not as robust in a steroid sparing LT center. Methods: Retrospective chart review of adult LT recipients between January 1, 2008 and June 30, 2019. All patients received low-dose valganciclovir 450 mg PO daily for CMV prophylaxis. Primary outcome was the incidence of CMV viremia in LT recipients at 12 months post-LT. Secondary outcomes include time to CMV viremia, risk factors for the development of CMV viremia, and incidence of breakthrough CMV viremia while on valganciclovir prophylaxis.Results: A total of 266 patients were included. Overall, the majority were male (63.2%) and Caucasian (45.5%). The most common indication for transplant was decompensated cirrhosis (82%). The incidence of CMV at 1 year posttransplant was 7.9%. Independent risk factors included high risk status (OR 5.97, 95% CI 2.14-16.61, p = .001) as well as having an episode of rejection (OR 5.99, 95% CI 2.16-16.66, p = .001). Conclusion:Low-dose valganciclovir can be effective in the prevention of CMV viremia in LT patients and may be a beneficial strategy for CMV prophylaxis in a steroid-sparing transplant center. Further studies may be needed to determine appropriate length of prophylaxis therapy for different risk groups.
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