{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,11]],"date-time":"2025-11-11T15:31:04Z","timestamp":1762875064522},"reference-count":35,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2005,12,7]],"date-time":"2005-12-07T00:00:00Z","timestamp":1133913600000},"content-version":"vor","delay-in-days":4085,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Medical Virology"],"published-print":{"date-parts":[[1994,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Hepatitis B virus (HBV) genomes have been classified into six groups, A\u2013F, group F being the most divergent. South America has provided the smallest number of strains studied at the genome level. The only HBV strain from this region sequenced completely has been classified in group F, and contains the most divergent of the HBV genomes presently known [Naumann et al. (1983): Journal of General Virology 74:1627\u20131632]. To evaluate genetic relatedness between strains isolated in South America and in the rest of the world, a restriction endonuclease analysis was carried out on 14 HBV strains (4 <jats:italic>adw<\/jats:italic>2, 3 <jats:italic>adw4<\/jats:italic>, 3 <jats:italic>ayw2<\/jats:italic>, and 4 <jats:italic>ayw3<\/jats:italic>) isolated in Rio de Janeiro, Brazil. C, pre\u2010S, and X genes along with the 5\u2032 part of the P gene from these strains were amplified by the polymerase chain reaction. The DNA fragments were digested by BamHI, BstEII, EcoRI, Hhal, and Taql endonucleases. The restriction patterns obtained were compared with those deduced from the nucleotide sequence of 26 HBV strains isolated in other continents. The results showed a large genetic variability of Brazilian strains. Taking into account that all the samples examined possessed the <jats:italic>w<\/jats:italic> antigenic subdeterminant, the number of different restriction patterns of strains isolated in Rio de Janeiro was at least as large as that of the reference strains isolated in the rest of the world. Some original restriction patterns were found in <jats:italic>adw4<\/jats:italic> and <jats:italic>ayw2<\/jats:italic> HBV strains.<\/jats:p>","DOI":"10.1002\/jmv.1890440212","type":"journal-article","created":{"date-parts":[[2007,3,3]],"date-time":"2007-03-03T00:14:29Z","timestamp":1172880869000},"page":"180-186","source":"Crossref","is-referenced-by-count":55,"title":["Genetic diversity of hepatitis B virus strains isolated in Rio de Janeiro, Brazil"],"prefix":"10.1002","volume":"44","author":[{"given":"C.","family":"Niel","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. T. 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