Molecular diversity in irregular or refugee immigrant patients with HBV-genotype-E infection living in the metropolitan area of Naples
Journal of Medical Virology, ISSN: 1096-9071, Vol: 89, Issue: 6, Page: 1015-1024
2017
- 11Citations
- 35Captures
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Metrics Details
- Citations11
- Citation Indexes11
- CrossRef11
- 10
- Captures35
- Readers35
- 35
Article Description
In a recent testing in the metropolitan area of Naples, Italy, on 945 irregular immigrants or refugees, 87 HBsAg chronic carriers were identified, 53 of whom were infected by HBV-genotype E. The aim of the present study was to identify the genetic diversity of HBV-genotype E in these 53 immigrants. The 53 immigrant patients with HBV-genotype-E infection were born in Africa, central or eastern Asia, eastern Europe or Latin America. These patients had been seen for a clinical consultation at one of the four first-level units from January 2012 to 2013. The first dataset contained 53 HBV-S gene isolates plus 128 genotype/subgenotype specific reference sequences downloaded from the National Center for Biotechnology Information. The second dataset, comprising the 53 HBV-S gene isolates, previously classified as HBV-genotype E, was used to perform the time-scaled phylogeny reconstruction using a Bayesian approach. Phylogenetic analysis showed that all 53 HBV-S isolates belonged to HBV-genotype E. Bayes factor analysis showed that the relaxed clock exponential growth model fitted the data significantly better than the other models. The time-scaled Bayesian phylogenetic tree of the second dataset showed that the root of the tree dated back to the year 1990 (95% HPD:1984–2000). Four statistically supported clusters were identified. Cluster A dated back to 2012 (95% HPD:1997–2012); cluster B dated back to 2008 (95% HPD:2001–2015); cluster C to 2006 (95% HPD:1999–2013); cluster D to 2004 (95% HPD:1998–2011). This study disclosed the genetic evolution and phylogenesis in a group of HBV-genotype-E-infected immigrants. J. Med. Virol. 89:1015–1024, 2017. © 2016 Wiley Periodicals, Inc.
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