Abstract
Aim: Infection of John Cunningham virus (JCV) usually occurs in early childhood and can lead to progressive multifocal leukoencephalopathy in immunosuppressed individuals. In this study, prevalence, reactivation and genotypes of JCV were evaluated. Materials & methods: Overall, 128 sex-matched individuals, including 64 patients with end-stage renal disease (ESRD) and 64 kidney transplant (KT) patients were evaluated using PCR and reverse transcriptase-PCR. Results: JCV DNA was detected in the urine samples of 17.2% of KT recipients and 1.6% of ESRD patients. Reactivation of JCV was determined in 12.5% of KT patients. All JCV-DNA-positive samples belonged to Af2 genotype (subtype b). Conclusion: Rare excretion of JCV in the ESRD urine samples can be associated with kidney function. JCV shedding and reactivation occur more frequently in the first 2 years following kidney transplantation. The genotype of Af2-b is circulating among the population of Iran.
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