| incidence of antibodies against human immunodeficiency virus, human t-cell lymphotropic virus type 1, hepatitis b virus, hemorrhagic fever with renal syndrome virus and chlamydia in tonga and western samoa. | among the populations of tonga and western samoa, serum antibodies against human immunodeficiency virus or hemorrhagic fever with renal syndrome virus were not detected (0/904 and 0/192). no serum samples were considered to be positive for antibody against human t-cell lymphotropic virus type 1 (0/527). hepatitis b antigen and antibody were found in 4% (8/192) and 47% (90/192), respectively. chlamydia trachomatis igg and c. psittaci igg antibodies were detected in 39% (75/192) and 47% (91/192), ... | 1990 | 2126048 |
| associations between hla class i alleles and escape mutations in the hepatitis b virus core gene in new zealand-resident tongans. | the full repertoire of hepatitis b virus (hbv) peptides that bind to the common hla class i molecules found in areas with a high prevalence of chronic hbv infection has not been determined. this information may be useful for designing immunotherapies for chronic hepatitis b. we identified amino acid residues under positive selection pressure in the hbv core gene by phylogenetic analysis of cloned dna sequences obtained from hbv dna extracted from the sera of tongan subjects with inactive, hbeag- ... | 2010 | 19846510 |
| prevalence of hepatitis b virus infection in tonga: identifying high risk groups for immunization with hepatitis b vaccine. | a serological survey for evidence of hepatitis b virus (hbv) infection was conducted in the kingdom of tonga as the first step in developing a strategy for an immunization programme. there were 414 individuals from the general population plus 137 pregnant women included in the survey. hbsag was found in 20% of the general population and 88% had one or more serologic markers of hbv infection. in the 5-9 year age group, 80% of the children had one or more markers of hbv, and in the 10-19 year age ... | 1986 | 2950066 |