Abstract
Six novel subgenotypes (B7, B8, C6, C8, C9, and D6) within three hepatitis B virus (HBV) genotypes (B–D) were recently identified in Indonesia. To further characterize HBV in this country, 18 HBV-viremic samples obtained from blood donors in Nusa Tenggara, Indonesia, were subjected to phylogenetic analysis of an 1.6-kb partial or full-length sequence. Thirteen HBV isolates were classified into genotype B with four distinct subgenotypes [B3 (n = 2), B5 (n = 1), B7 (n = 4), and B8 (n = 6)], followed by 4 HBV isolates of genotype C (HBV/C); the remaining one isolate was of D (D1). As for the four HBV/C isolates, one isolate segregated into subgenotype C1, and two into C2. The remaining HBV/C isolate [C0901177(NT3)] differed from reported HBV/C isolates (C1–C9) by 4.6–7.7% over the entire genome and did not show evidence of recombination with any of the known HBV genotypes/subgenotypes, justifying its conclusive assignment into a novel subgenotype (C10) within genotype C.
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Acknowledgments
This study was supported in part by a grant from the Ministry of Education, Culture, Sports, Science and Technology of Japan. The authors are grateful to Dr. Teron of Kupang Blood Center, who helped us to collect blood samples, for his invaluable contributions.
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The nucleotide sequence data reported in this study have been assigned DDBJ/EMBL/GenBank accession numbers AB540582-AB540585 for 4 full-length HBV genomes and AB540586-AB540599 for 14 1.6-kb partial HBV sequences.
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Mulyanto, Depamede, S.N., Surayah, K. et al. Identification and characterization of novel hepatitis B virus subgenotype C10 in Nusa Tenggara, Indonesia. Arch Virol 155, 705–715 (2010). https://doi.org/10.1007/s00705-010-0628-x
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DOI: https://doi.org/10.1007/s00705-010-0628-x