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[EBV replication and therapy of oral hairy leukoplakia using acyclovir].

The therapy of choice for oral hairy leucoplakia in HIV-infected patients is treatment with acyclovir. During treatment the replication of Epstein-Barr Virus (EBV) in cells scraped from the epithelium of hairy leucoplakia was investigated using filter-in-situ hybridization. On the 2nd day of treatment a slight and on the 5th day a marked reduction of the replication was observed, and on the 8th day of treatment replication of EBV could hardly be detected. At that time a marked regression of leucoplakia was seen. Within another 7 days the lesions had completely disappeared. These findings demonstrate the relationship between treatment with acyclovir and inhibition of EBV replication in hairy leucoplakia and the relationship between inhibition of EBV replication and remission of hairy leucoplakia.