title: [Estimation on the HIV-1 incidence in Liangshan Yi Autonomous Prefecture, under BED-capture enzyme immunoassay, from 2011 to 2013].
abstract: OBJECTIVE
  This paper aimed to analyze the situation of HIV infection in Liangshan Yi Autonomous, including HIV recent rate of infection and the ongoing strategies on prevention of the disease in this prefecture.
  
  
  METHODS
  Surveillance data on population size, medical institutions, from 2011 to 2013 in Liangshan prefecture was collected. The total numbers of people living in the areas appeared as 412 608, 393 699 and 443 025 from the above mentioned three years. The overall numbers of people living with HIV/AIDS were 4 480, 3 999 and 4 719 respectively in the three years of observation, using the ELISA and WB blot. We also used the ELISA, and Western blotting methods to find out the HIV-positive individuals. We then applied the ' BED HIV-1 incidence capture enzyme immunoassay (BED-CEIA)' on these HIV-positive individuals to locate those who were recently infected, to estimate the annual recent infection rates.
  
  
  RESULTS
  The HIV-positive rates in Liangshan Prefecture appeared as 1.09%, 1.02% and 1.07% respectively, from 2011 to 2013, with the recent infection rates as 0.34% (95%CI: 0.32-0.37), 0.62% (95%CI: 0.58-0.66) and 0.61% (95%CI: 0.57-0.65) respectively. The newly infections mainly involved with males, with Yi ethnicity, married, being illiterate or received primary school education. In males, the rates of infection appeared as 64.24% (433/674), 59.22% (504/851) and 58.37% (495/848) respectively, in the three years of observation among people with Yi ethnicity, the recent infection rates were 84.72% (571/674) in 2011, 94.59% (805/851) in 2012 and 84.20% (714/848) in 2013. The rates seen in married people were 61.57% (415/674), 61.45% (523/851) and 60.50% (513/848) respectively. Among the illiterates or people only received primary school education, the rates appeared as 60.24% (406/674) in 2011, 61.57% (524/851) in 2012, and 60.03% (509/848) in 2013.
  
  
  CONCLUSIONS
  Using the HIV recent infection rate to describe the situation of AIDS in Liangshan prefecture, figures seemed to be more reliable than under the regular HIV-positive rate.
authors.affiliation: West China School of Public Health, Sichuan University, Chengdu 610041, China.
authors.forename: Q G
authors.initials: QG
authors.lastname: Zhao
authors.affiliation: Liangshan Center for Disease Control and Prevention, Xichang 615000, China.
authors.forename: Y H
authors.initials: YH
authors.lastname: Gong
authors.affiliation: Liangshan Center for Disease Control and Prevention, Xichang 615000, China.
authors.forename: Q
authors.initials: Q
authors.lastname: Liao
authors.affiliation: Liangshan Center for Disease Control and Prevention, Xichang 615000, China.
authors.forename: G
authors.initials: G
authors.lastname: Yu
authors.affiliation: Liangshan Center for Disease Control and Prevention, Xichang 615000, China.
authors.forename: K
authors.initials: K
authors.lastname: Wang
authors.affiliation: Liangshan Center for Disease Control and Prevention, Xichang 615000, China.
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.affiliation: Liangshan Center for Disease Control and Prevention, Xichang 615000, China.
authors.forename: B P
authors.initials: BP
authors.lastname: Yin
authors.affiliation: West China School of Public Health, Sichuan University, Chengdu 610041, China.
authors.forename: S J
authors.initials: SJ
authors.lastname: Yang
authors.affiliation: West China School of Public Health, Sichuan University, Chengdu 610041, China.
authors.forename: J X
authors.initials: JX
authors.lastname: Zhang
authors.affiliation: West China School of Public Health, Sichuan University, Chengdu 610041, China.
authors.forename: P Y
authors.initials: PY
authors.lastname: Liang
authors.affiliation: Liangshan Center for Disease Control and Prevention, Xichang 615000, China.
authors.forename: Q X
authors.initials: QX
authors.lastname: Wang
mesh_terms: D002681:China / Q000453:epidemiology; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D005006:Ethnicity; D015658:HIV Infections / Q000175:diagnosis* / Q000453:epidemiology* / Q000821:virology; D015497:HIV-1 / Q000276:immunology*; D006801:Humans; D007124:Immunoenzyme Techniques / Q000379:methods; D015994:Incidence; D008297:Male; D008393:Marriage; D012959:Socioeconomic Factors