title: Molecular epidemiology and population dynamics of hepatitis B virus in Dianjiang County, Chongqing, China.
abstract: Hepatitis B virus infection is highly endemic in China, especially in rural areas such as Dianjiang County with poor-quality health care and little local HBV information. Therefore, for the first time, the present study was carried out to investigate the molecular epidemiology, phylogeny and population dynamics of HBV based on 146 HBV-infected patients. A 435-bp portion of the HBV S region was sequenced, and the phylogeny was reconstructed, indicating that three genotypes, B, C and D of HBV were distributed in Dianjiang County. The predominant genotype is B (67.12 %), followed by C (32.19 %) and D (0.68 %). Patient demographic information and clinical outcomes were examined by genotypes, and no significant association was found. Population dynamics analysis suggested that both genotype B and C have experienced a tenfold expansion during the last five years for reasons that are unclear. Thus, a thorough molecular epidemiology investigation is strongly recommended in the future.
authors.affiliation: Dianjiang people's hospital of Chongqing, Chongqing, China.
authors.forename: Mingyan
authors.initials: M
authors.lastname: Ma
authors.forename: Miao
authors.initials: M
authors.lastname: He
authors.forename: Liya
authors.initials: L
authors.lastname: Liao
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Guo
authors.forename: Dengqiong
authors.initials: D
authors.lastname: Yu
authors.forename: Zhongzheng
authors.initials: Z
authors.lastname: Xiong
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
authors.forename: Peibin
authors.initials: P
authors.lastname: Zeng
authors.forename: Pu
authors.initials: P
authors.lastname: Liao
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002681:China / Q000453:epidemiology; D005260:Female; D005838:Genotype; D006509:Hepatitis B / Q000453:epidemiology / Q000821:virology*; D006514:Hepatitis B Surface Antigens / Q000235:genetics; D006515:Hepatitis B virus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification*; D006801:Humans; D008297:Male; D008875:Middle Aged; D017720:Molecular Epidemiology; D008969:Molecular Sequence Data; D010802:Phylogeny; D055815:Young Adult
chemical_list: D006514:Hepatitis B Surface Antigens