| hepatitis b virus dna in sera of virus carriers positive exclusively for antibodies to the hepatitis b core antigen. | the prevalence of serum hbv dna in individuals positive for anti-hbc alone was determined by the polymerase chain reaction in two groups with endemic hbv infection from canton (group a) and hainan (group b), provinces of china. twenty-one out of 294 individuals in group a (7.2%) and 193 out of 1995 in group b (9.7%) were positive for anti-hbc but negative for other markers of ongoing or past hbv infection (hbsag and anti-hbs). hbv dna was detected in 6/21 sera in group a (28.6%) and 68/193 in gr ... | 1991 | 1940884 |
| frequency of hepatitis b virus e-minus mutants varies among patients from different areas of china. | four hundred forty-six serum samples from hbsag-positive chronic hepatitis b patients were collected from five areas in china (eastern coastal city, shanghai; southwestern inland city, chengdu; mid-inland city, wuhan; southern island city, haikou; and northeastern city, changchun). precore stop codon variants (e-minus mutants) were screened using a rapid method of polymerase chain reaction (pcr) amplification of a precore and partial core gene fragment (nucleotides 1785-2172), followed by dot-bl ... | 1997 | 9021537 |
| hepatitis b surface antigen prevalence among 12,393 rural women of childbearing age in hainan province, china: a cross-sectional study. | hepatitis b virus (hbv) infection is highly endemic in china and it threats human health seriously. the hepatitis b surface antigen (hbsag) prevalence among women of childbearing age plays an important role in mother to child transmission of hbv, as 30%~50% of chronic carriers can be attributed to maternal-infantile transmission. however, there are few studies which have reported on the prevalence of hbsag among women of childbearing age in china. this study aimed to determine the prevalence of ... | 2013 | 23332007 |