title: [Study on the molecular epidemiology of people infected with human immunodeficiency virus-1 in Shandong province].
abstract: OBJECTIVE
  To study the distribution of human immunodeficiency virus-1 (HIV-1) strains subtypes in Shandong province and to study their source in order to predict the epidemic trend.
  
  
  METHODS
  Epidemiological investigation was made and 93 DNA fragments of HIV-1 env, gag, tat gene were amplified by nested polymerase chain reaction from people infected with HIV-1, in 2002 - 2003. Their C2-V3, P17/P24, 1st exon of tat and adjacent region were sequenced.
  
  
  RESULTS
  Sequence analysis showed that there were 7 HIV-1 strains or circulating recombinant forms (CRFs), B' (n = 71), CRF01-AE (n = 9), CRF07-BC (n = 3), CRF08-BC (n = 3), B (n = 2), C (n = 2), CRF02-AG (n = 2). B' strains was the predominant which, covered 10 cities and 4 kinds of population including blood donors, blood receivers, spouses of the infected people and clients of the sex workers. CRF07-BC, CRF08-BC strains were identified in 5 cities, mainly from injecting drug users. CRF01-AE and other strains were found distributed in developed cities, among sex workers.
  
  
  CONCLUSIONS
  There were many kinds of subtypes and CRFs of HIV and their genomes which generated obvious variation in Shandong province, suggesting that they might facilitate the spread of the disease in Shandong province.
authors.affiliation: Shandong Provincial Center for Disease Control and Prevention, Jinan 250014, China.
authors.forename: Ji-hua
authors.initials: JH
authors.lastname: Fu
authors.forename: Sheng-zhang
authors.initials: SZ
authors.lastname: Li
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Xue-zhen
authors.initials: XZ
authors.lastname: Liu
authors.forename: Tao
authors.initials: T
authors.lastname: Huang
authors.forename: Hui
authors.initials: H
authors.lastname: Xing
authors.forename: Yi-ming
authors.initials: YM
authors.lastname: Shao
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002681:China / Q000453:epidemiology; D004279:DNA, Viral / Q000235:genetics*; D005260:Female; D015658:HIV Infections / Q000453:epidemiology* / Q000235:genetics; D015497:HIV-1 / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D008297:Male; D008875:Middle Aged; D017720:Molecular Epidemiology
chemical_list: D004279:DNA, Viral