title: [Discovery and whole genome sequences analysis of a dengue virus type 1 strain isolated in Henan province].
abstract: OBJECTIVE
  To diagnose imported dengue fever case from Henan province, and to sequence and analyze the characteristics of whole genome sequence, and to explore the possible viral origin source.
  
  
  METHODS
  A suspected dengue fever case was reported in Yuzhou city, Henan province. The patient returned from foshan, Guangdong province on September 19, 2014, after the epidemiological investigation and serum specimen collected, which dengue fever case was diagnosed in the laboratory, then it was inoculated on Vero cells. Whole genome sequence was amplified by several pairs primers and characterized using biologic software.
  
  
  RESULTS
  The imported case was diagnosed as dengue virus 1 serotype infection. Dengue 1 strain was isolated using Vero cells successfully. Whole genome was 10,670 nt, which belonged to dengue virus 1 serotype V genotype and didn't found any recombination event. The phylogenetic analysis demonstrated that the strain was closed to Indian starins isolated in 2008-2011, and the homology of nucleotide sequence was between 98.2%-99.4%.
  
  
  CONCLUSIONS
  It was the first time to discover imported dengue 1 serotype case in Henan province. However, according to the patient has been to Guangdong province before onset, it inferred that the Indian strain had been imported to Guangdong province before this case in Henan province.
authors.affiliation: Henan Provincial Key Laboratory of Medical Pathogenic Biology, Henan Provincial Center for Disease Control and Prevention, Zhengzhou 450016, China.
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Du
authors.affiliation: Henan Provincial Key Laboratory of Medical Pathogenic Biology, Henan Provincial Center for Disease Control and Prevention, Zhengzhou 450016, China.
authors.forename: Baifan
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Henan Provincial Key Laboratory of Medical Pathogenic Biology, Henan Provincial Center for Disease Control and Prevention, Zhengzhou 450016, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.affiliation: Henan Provincial Key Laboratory of Medical Pathogenic Biology, Henan Provincial Center for Disease Control and Prevention, Zhengzhou 450016, China.
authors.forename: Hongxia
authors.initials: H
authors.lastname: Ma
authors.affiliation: Henan Provincial Key Laboratory of Medical Pathogenic Biology, Henan Provincial Center for Disease Control and Prevention, Zhengzhou 450016, China.
authors.forename: Xueyong
authors.initials: X
authors.lastname: Huang
authors.affiliation: Henan Provincial Key Laboratory of Medical Pathogenic Biology, Henan Provincial Center for Disease Control and Prevention, Zhengzhou 450016, China; Email: xubl@hncdc.com.cn.
authors.forename: Bianli
authors.initials: B
authors.lastname: Xu
mesh_terms: D000818:Animals; D002681:China; D002522:Chlorocebus aethiops; D003715:Dengue; D003716:Dengue Virus; D005814:Genes, Viral; D005838:Genotype; D006801:Humans; D007194:India; D017720:Molecular Epidemiology; D065288:Serogroup; D014709:Vero Cells