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A case of hepatitis B virus infection in Eritrean Diciotti migrant: phylogenetic analysis and ‘mirror effect’

A case of hepatitis B virus (HBV) infection in an Eritrean migrant was described to provide an epidemiological approach based on phylogenetic analysis useful in developing countries with lacking information. Migrant, positive for HBsAg and HBeAg, carried HBV at high copy number. A sequence of HBV HBsAg region was used for phylogenetic relationships and genetic variability investigation. In the phylogenetic tree, the sequence corresponded to D2 HBV genotype and the cluster root dated 7 years ago. These data compared with the date of landing in Italy, suggest that he was infected at least 7 years before his arrival. This approach by ‘mirror effect’ allows the reconstruction of HBV epidemiology in the country of origin, analyzing the migrant population in the host country.