Prevalence and outcome of herpes zoster infection in renal transplant recipients.

Objectives: Varicella zoster virus (VZV) is an important pathogen after renal transplant. The aim of this study is to assess the outcome of disseminated Varicella zoster virus infection in renal transplant recipients and to determine potential risk factors for mortality.

Materials And Methods: From January 2001 to January 2014, we performed 1614 renal transplants at our institution. Varicella zoster virus infection was diagnosed in 41 patients (2.5%). Median time of diagnosis of Varicella zoster virus was 5 years after transplant (range, 3 mo to 13 y).

Results: Thirty-seven patients (90%) had dermatomal distribution of Varicella zoster virus, 4 patients (10%) had disseminated Varicella zoster virus infection. After diagnosis of Varicella zoster virus immunsuppressive therapy was reduced and patients received acyclovir. Cutaneous lesions were healed with a scar in 7 cases (17%). Two patients (5%) developed postherpetic neuralgia. Seventy percent of cases were diagnosed within 5 years, and 92% were diagnosed within 10 years after transplant. Mortality due to Varicella zoster virus was 2% (n = 1). Visceral involvement found to be a risk factor for mortality. Profilactic acyclovir or gancyclovir therapy following transplantation reduced Varicella zoster virus infection. However, Varicella zoster virus seropositivity did not influence fatal outcome.

Conclusions: Early initiation of antiviral therapy may prevent development of complication and visceral dissemination of disease. Active immunization should be applied for all seronegative patients before organ transplant.