HIV集合核酸检测在男男性行为人群中的应用评价

目的 评估集合核酸检测方法在男男性行为人群(MSM)中的应用,探索适合该人群的HIV早期感染检测策略及应用该方法估算新发感染率的可行性.方法 本研究共采集4 856份2008年4月至2009 年9月我国黑龙江省(4 156份样品)和北京市(700份样品)MSM人群的样品.分别经三代ELISA、四代ELISA和WB检测后,HIV阴性样品进行集合核酸检测.样品集合采用三级集合策略.并计算和比较"三代ELISA检测+WB"、"四代ELISA检测+WB"、"三代ELISA检测+WB+集合核酸检测"和"四代ELISA检测+WB+集合核酸检测"的HIV检测阳性率.4 156份黑龙江省MSM人群样品中符合条件的WB确认阳性样品纳入BED-捕获酶联试验 (BED-CEIA),并应用BED方法和集合核酸检测方法进行新发感染率估算.结果 4 856份样品中共有143份被判定为HIV阳性,其中经三代和四代ELISA检测为阳性的样品均为130份,窗口期感染样品13份.常规ELISA检测加核酸检测能最有效检测出MSM人群窗口期感染者;4种检测策略的HIV检测阳性率分别为:2.68%(95%CI 为2.22%～3.14%)、2.82%(95%CI 为2.35%～3.29%)、2.94%(95%CI 为2.46%～3.42%)和2.94%(95%CI 为2.46%～3.42%),差异无统计学意义(χ2=0.854 3,P=0.836 4).4 156份黑龙江省样品中有88份纳入BED检测,41份样品被判为新近感染.应用BED检测方法和集合核酸检测方法估算的HIV发病率分别为2.36%(95%CI 为1.63%～3.08%)和2.92%(95%CI 为1.01%～4.83%).结论 HIV集合核酸检测技术能有效地筛查出窗口期感染者,可用于我国MSM人群窗口期检测.

Abstract：

Objective To evaluate the application of pooling HIV nucleic acid amplification testing (NAAT) among men who had sex with men (MSM) population, and to investigate suitable HIV screening strategy and the feasibility of calculation of HIV incidence using pooling NAAT among MSM population in China.Methods Four thousand eight hundred and fifty-six samples were collected from MSM population from April 2008 to September 2009 among with 4 156 were in Heilongjiang province and 700 were in Beijing in China. After standard testing with an HIV ELISA and WB confirmation testing, HIV antibody-negative samples were pooled and screened for HIV using NAAT.A three-stage pooling strategy was adopted.The HIV positive rate estimated by the four HIV screening strategies was calculated.In addition, 4 156 HIV positive specimens from Heilongjiang province were screened with the BED capture enzyme immunoassay (BED-CEIA).The HIV-1 incidences were estimated by BED-CEIA assay and pooling NAAT individually.ResultsOne hundred and forty-three of 4 856 subjects were HIV infected.130 were 3rd and 4th generation ELISA positive; 13 were antibody-negative but acutely HIV infected.According to the evaluation of four HIV screening strategies, routine HIV screening test together with pooling NAAT was more effective than other strategies for screening out window period generation ELISA+WB+pooling NAAT' were 2.68%(95% confidence interval CI=2.22%-3.14%), 2.82%(95%CI=2.35%-3.29%), 2.94%(95%CI=2.46%-3.42%) and 2.94%(95%CI=2.46%-3.42%), respectively.The differences were not significant (χ2=0.854 3, P=0.836 4).Of the 88 HIV positive samples from Heilongjiang province, 44 participants were tested as recent HIV infections by BED-CEIA assay. The estimated HIV-1 incidence was 2.36% (95%CI=1.63%-3.08%) and 2.92% (95%CI=1.01%-4.83%) based on BED-CEIA assay and pooling NAAT,respectively.Conclusions Pooling NAAT is a effective screening test in HIV negative population to detect window period infection among MSM population in China.

Evaluation of application of pooling nucleic acid amplification testing in men who have sex with men population in China

Objective To evaluate the application of pooling HIV nucleic acid amplification testing (NAAT) among men who had sex with men (MSM) population, and to investigate suitable HIV screening strategy and the feasibility of calculation of HIV incidence using pooling NAAT among MSM population in China.Methods Four thousand eight hundred and fifty-six samples were collected from MSM population from April 2008 to September 2009 among with 4 156 were in Heilongjiang province and 700 were in Beijing in China. After standard testing with an HIV ELISA and WB confirmation testing, HIV antibody-negative samples were pooled and screened for HIV using NAAT.A three-stage pooling strategy was adopted.The HIV positive rate estimated by the four HIV screening strategies was calculated.In addition, 4 156 HIV positive specimens from Heilongjiang province were screened with the BED capture enzyme immunoassay (BED-CEIA).The HIV-1 incidences were estimated by BED-CEIA assay and pooling NAAT individually.ResultsOne hundred and forty-three of 4 856 subjects were HIV infected.130 were 3rd and 4th generation ELISA positive; 13 were antibody-negative but acutely HIV infected.According to the evaluation of four HIV screening strategies, routine HIV screening test together with pooling NAAT was more effective than other strategies for screening out window period generation ELISA+WB+pooling NAAT' were 2.68%(95% confidence interval CI=2.22%-3.14%), 2.82%(95%CI=2.35%-3.29%), 2.94%(95%CI=2.46%-3.42%) and 2.94%(95%CI=2.46%-3.42%), respectively.The differences were not significant (χ2=0.854 3, P=0.836 4).Of the 88 HIV positive samples from Heilongjiang province, 44 participants were tested as recent HIV infections by BED-CEIA assay. The estimated HIV-1 incidence was 2.36% (95%CI=1.63%-3.08%) and 2.92% (95%CI=1.01%-4.83%) based on BED-CEIA assay and pooling NAAT,respectively.Conclusions Pooling NAAT is a effective screening test in HIV negative population to detect window period infection among MSM population in China.