title: Seroepidemiology and molecular characterization of hepatitis E virus in Jilin, China.
abstract: BACKGROUND
  In order to develop region-specific diagnostic assays and prevent hepatitis E virus (HEV), it is essential to understand epidemiology and genotypic variation within different populations. However, the epidemiological data of HEV infections in Jilin is shortage.
  
  
  METHODS
  The seroepidemiological study was conducted by enzyme-linked immunosorbent assay, and the conserved genomic sequences of open reading frame 2 (348 bp) was detected using reverse transcription-PCR.
  
  
  RESULTS
  Overall, 1,289 serum samples were positive to HEV-specific immunoglobulin G (IgG), and 180 serum samples were positive to HEV-specific immunoglobulin M (IgM). The seroprevalence of HEV-specific IgG was 26.3%, 27.9%, 25.3%, 32.7% in 2003, 2004, 2005, 2006, respectively. Acute HEV infection mainly occurred in male, people aged from 20 to 69 were more susceptible to infection, and cases with IgM anti-HEV reaction mainly occurred from July to November. HEV RNA was detectable in the serum samples or stool suspension of 15 patients with HEV-specific IgM, and all of these belonged to genotype IV.
  
  
  CONCLUSIONS
  Our results indicate that HEV is widely spread in Jilin and confined to genotype IV.
authors.affiliation: Genetic Engineering Laboratory, Academy of Military Medical Sciences, 1068 Qinglong Road, Changchun, 130062, People's Republic of China.
authors.forename: G
authors.initials: G
authors.lastname: Zhu
authors.forename: Y
authors.initials: Y
authors.lastname: Qu
authors.forename: N
authors.initials: N
authors.lastname: Jin
authors.forename: Z
authors.initials: Z
authors.lastname: Sun
authors.forename: T
authors.initials: T
authors.lastname: Liu
authors.forename: H
authors.initials: H
authors.lastname: Lee
authors.forename: M
authors.initials: M
authors.lastname: Tian
authors.forename: T
authors.initials: T
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016009:Chi-Square Distribution; D002648:Child; D002681:China / Q000453:epidemiology; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005838:Genotype; D006508:Hepatitis Antibodies / Q000097:blood*; D016751:Hepatitis E / Q000453:epidemiology* / Q000276:immunology / Q000821:virology; D016752:Hepatitis E virus / Q000145:classification* / Q000235:genetics / Q000276:immunology*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D007075:Immunoglobulin M / Q000097:blood; D008297:Male; D008875:Middle Aged; D010802:Phylogeny; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012621:Seasons; D016036:Seroepidemiologic Studies; D012703:Serotyping
chemical_list: D006508:Hepatitis Antibodies; D007074:Immunoglobulin G; D007075:Immunoglobulin M