The characteristics of Hepatitis B virus genotypes in Kunming
10.3760/cma.j.issn.1673-4130.2010.05.013
- VernacularTitle:昆明地区HBV DNA基因型的分布特征
- Author:
Yue ZHANG
;
Zhongming CHEN
- Publication Type:Journal Article
- Keywords:
Hepatitis B virus;
Genotype;
Polymerase Chain Reaction
- From:
International Journal of Laboratory Medicine
2010;31(5):444-446
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the distribution and the characteristics of HBV genotype in Kunming City,China.Methods The HBV genotypes and HBV-DNA levels of 360 patients in Kunming were detected by real-time quantitative PCR using type-specific primers,the serum-types were also detected in ELISA at the same time.Results Of the 360 specimens,346(96.11%) could be detected directly,among them 196 were genotype C(56.65%),91 were genotype B(26.30%),91 were genotype B(26.30%),37 were in B-C mix-type (10.69%),21 were genotype D(6.07%),1 were genotype A(0.29%).Among them,the genotype C was higer than the others (P<0.01);HBV-DNA levels of the patients with genotype C and B-C mix-type were higer than the genotype B and the others(P<0.01,P<0.05) (beside the positive proportions of genotype B was lower in the serum with"HB-sAg( + ),HBeAg( + ),anti-HBc( + )"(P<0.01),the other genotypes were no relation with their serum-types (P>0.05);the 360 specimens,14(3.89%)could not be detected directly,the average level of them was 4.136X 103IU/ml,it was lower than that of others(P<0.05).Conclusion The HBV-genotypes in Kunming area are abundant,including genotype C,B,D,A and B/C mix-type.The dominant genotype of HBV are C and B,and the HBV-DNA level of genotypes B/C mix-type and C were singnificantly higher than that of others ;The negative relation existed between the genotype B's frequency and the positive proportions of HBeAg;The genotype D frequency of this region is higher than that of lower-altitude inland areas and lower than that of plateau areas around Lahsa,which probably stands for its epidemiologic feature.Meanwhile,those samples without direct identification contain relatively lower level of HBV-DNA,which probably suggests that HBV genotype should be conducted on a basis of a certain HBV-DNA quantity.
