HIV viral load

HIV 病毒载量
  • 文章类型: Journal Article
    背景:非洲农村艾滋病毒感染者在进入和继续接受艾滋病毒护理方面面临重大挑战。在乌干达农村,例如,与全国平均水平相比,艾滋病毒的患病率高出三倍,而在整个艾滋病毒持续护理过程中的参与度较低。迫切需要采取适当的干预措施,以改善乌干达农村艾滋病毒感染者的艾滋病毒护理的进入和保留。尽管农村地区许多感染艾滋病毒的成年人优先考虑从传统治疗师那里寻求护理服务,而不是正规的临床服务,治疗师还没有被纳入艾滋病毒护理计划。Omuyambi试验正在调查传统治疗师提供的心理社会支持作为标准HIV护理与仅基于临床的标准HIV护理的辅助手段的有效性。此外,我们正在评估实施过程和结果,遵循实施研究的综合框架。
    方法:这项整群随机混合1型有效性实施试验将在乌干达西南部两个地区的44名传统治疗师中进行。治疗师以1:1随机分配到研究组,在那里,干预部门的治疗师将为未抑制的HIV病毒载量的成年人提供12个月的社会心理支持。将从Mbarara和Rwampara地区的治疗人群中招募650名HIV病毒载量未受抑制的成年人。主要研究结果是在入学后12个月测量的HIV病毒载量,这将通过意向治疗进行分析。次要临床结果指标包括(重新)开始艾滋病毒护理,抗逆转录病毒治疗依从性,并保留在护理中。收养的实施成果,保真度,适当性,可接受性将通过关键线人访谈和基线结构化调查进行评估,3、9、12和24个月。可持续性将通过在注册后24个月的HIV病毒载量测量来衡量。
    结论:Omuyambi试验正在评估一种方法,该方法可以通过将以前被忽视的社区支持者纳入HIV护理级联中来改善HIV结果。这些发现可以提供有效性和实施证据,以指导旨在改善乌干达农村和其他国家的艾滋病毒结果的政策和计划的制定,这些国家的治疗师在社区卫生中起着至关重要的作用。
    背景:ClinicalTrials.govNCT05943548。2023年7月5日注册。目前的协议版本是4.0(2023年9月29日)。
    BACKGROUND: Rural African people living with HIV face significant challenges in entering and remaining in HIV care. In rural Uganda, for example, there is a threefold higher prevalence of HIV compared to the national average and lower engagement throughout the HIV continuum of care. There is an urgent need for appropriate interventions to improve entry and retention in HIV care for rural Ugandans with HIV. Though many adults living with HIV in rural areas prioritize seeking care services from traditional healers over formal clinical services, healers have not been integrated into HIV care programs. The Omuyambi trial is investigating the effectiveness of psychosocial support delivered by traditional healers as an adjunct to standard HIV care versus standard clinic-based HIV care alone. Additionally, we are evaluating the implementation process and outcomes, following the Consolidated Framework for Implementation Research.
    METHODS: This cluster randomized hybrid type 1 effectiveness-implementation trial will be conducted among 44 traditional healers in two districts of southwestern Uganda. Healers were randomized 1:1 into study arms, where healers in the intervention arm will provide 12 months of psychosocial support to adults with unsuppressed HIV viral loads receiving care at their practices. A total of 650 adults with unsuppressed HIV viral loads will be recruited from healer clusters in the Mbarara and Rwampara districts. The primary study outcome is HIV viral load measured at 12 months after enrollment, which will be analyzed by intention-to-treat. Secondary clinical outcome measures include (re)initiation of HIV care, antiretroviral therapy adherence, and retention in care. The implementation outcomes of adoption, fidelity, appropriateness, and acceptability will be evaluated through key informant interviews and structured surveys at baseline, 3, 9, 12, and 24 months. Sustainability will be measured through HIV viral load measurements at 24 months following enrollment.
    CONCLUSIONS: The Omuyambi trial is evaluating an approach that could improve HIV outcomes by incorporating previously overlooked community lay supporters into the HIV cascade of care. These findings could provide effectiveness and implementation evidence to guide the development of policies and programs aimed at improving HIV outcomes in rural Uganda and other countries where healers play an essential role in community health.
    BACKGROUND: ClinicalTrials.gov NCT05943548. Registered on July 5, 2023. The current protocol version is 4.0 (September 29, 2023).
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  • 文章类型: Journal Article
    在传染病的背景下,不断变化的宿主种群和病毒生物学之间的动态相互作用需要比常见的固定相关性更灵活的建模方法.采用随机效应回归模型可以对复杂现象背后的复杂生态和进化动力学进行细致的理解。为疾病进展和传播模式提供有价值的见解。在这篇文章中,我们采用随机效应回归对2019-2021年间墨西哥城HIV感染者中观察到的血浆病毒载量(pVL)中位数下降进行建模.我们确定了这些功能斜率变化(即每年的随机斜率)如何改善对2019年至2021年之间观察到的pVL中位数变化的预测,从而使我们假设潜在的生态和进化因素。我们的分析涉及来自7325名HIV感染者的pVL值数据集,伴随着它们相关的临床和病毒分子预测因子。传统的固定效应线性模型揭示了pVL与随时间演变的预测因子之间的显着相关性。然而,这种固定效应模型不能完全解释中位数pVL的降低;因此,促使我们采用随机效应模型。在应用随机效应回归模型后-具有按年份的随机斜率和截距-,我们观察到当地HIV病毒人群中潜在的“功能变化”,强调HIV动力学中生态和进化考虑因素的重要性:HIVpVL和pol基因中CpG含量之间出现了明显更强的负相关,提示受CpG诱导的先天免疫反应影响的免疫景观变化,这可能会影响病毒载量动态。我们的研究强调了随机效应模型在捕获动态相关性方面的重要性以及CpG含量等分子特征的关键作用。通过丰富我们对改变宿主病毒相互作用和HIV进展的理解,我们的发现有助于此类模型在传染病研究中具有更广泛的相关性.他们揭示了宿主和病原体之间不断变化的相互作用,推动我们更接近更有效的传染病管理策略。这项研究的意义:这项研究强调了2019年至2021年间墨西哥城艾滋病毒感染者中血浆病毒载量中位数的下降趋势。它揭示了与pVL显著相关的各种预测因子,阐明宿主病毒相互作用与疾病进展之间复杂的相互作用。通过采用随机斜率模型,研究人员超越了传统的固定效应模型,更好地捕捉HIV动力学的动态相关性和进化变化.发现HIV-pol序列中pVL和CpG含量之间存在更强的负相关,这表明免疫景观和先天免疫反应的潜在变化。为进一步研究艾滋病毒感染背景下的适应性变化和对环境变化的反应开辟了途径。该研究强调分子特征作为pVL的预测因子,为病毒的流行病学和进化研究增加了有价值的见解。为在人口层面理解和管理艾滋病毒感染提供了新的途径。
    In the context of infectious diseases, the dynamic interplay between ever-changing host populations and viral biology demands a more flexible modeling approach than common fixed correlations. Embracing random-effects regression models allows for a nuanced understanding of the intricate ecological and evolutionary dynamics underlying complex phenomena, offering valuable insights into disease progression and transmission patterns. In this article, we employed a random-effects regression to model an observed decreasing median plasma viral load (pVL) among individuals with HIV in Mexico City during 2019-2021. We identified how these functional slope changes (i.e. random slopes by year) improved predictions of the observed pVL median changes between 2019 and 2021, leading us to hypothesize underlying ecological and evolutionary factors. Our analysis involved a dataset of pVL values from 7325 ART-naïve individuals living with HIV, accompanied by their associated clinical and viral molecular predictors. A conventional fixed-effects linear model revealed significant correlations between pVL and predictors that evolved over time. However, this fixed-effects model could not fully explain the reduction in median pVL; thus, prompting us to adopt random-effects models. After applying a random effects regression model-with random slopes and intercepts by year-, we observed potential \"functional changes\" within the local HIV viral population, highlighting the importance of ecological and evolutionary considerations in HIV dynamics: A notably stronger negative correlation emerged between HIV pVL and the CpG content in the pol gene, suggesting a changing immune landscape influenced by CpG-induced innate immune responses that could impact viral load dynamics. Our study underscores the significance of random effects models in capturing dynamic correlations and the crucial role of molecular characteristics like CpG content. By enriching our understanding of changing host-virus interactions and HIV progression, our findings contribute to the broader relevance of such models in infectious disease research. They shed light on the changing interplay between host and pathogen, driving us closer to more effective strategies for managing infectious diseases. SIGNIFICANCE OF THE STUDY: This study highlights a decreasing trend in median plasma viral loads among ART-naïve individuals living with HIV in Mexico City between 2019 and 2021. It uncovers various predictors significantly correlated with pVL, shedding light on the complex interplay between host-virus interactions and disease progression. By employing a random-slopes model, the researchers move beyond traditional fixed-effects models to better capture dynamic correlations and evolutionary changes in HIV dynamics. The discovery of a stronger negative correlation between pVL and CpG content in HIV-pol sequences suggests potential changes in the immune landscape and innate immune responses, opening avenues for further research into adaptive changes and responses to environmental shifts in the context of HIV infection. The study\'s emphasis on molecular characteristics as predictors of pVL adds valuable insights to epidemiological and evolutionary studies of viruses, providing new avenues for understanding and managing HIV infection at the population level.
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  • 文章类型: Journal Article
    目的:分析COVID-19大流行效应对临床接触类型的急性影响和长期恢复,HIV病毒载量(VL)测试和抑制(HIVVL<200拷贝/mL)。
    2019-2022年期间在八个HIV门诊研究(HOPS)站点进行的参与者的纵向队列研究。
    广义线性混合模型(GLMM)估计所有相遇的月费率,办公室和远程医疗访问,和HIVVL检测使用2010-2022年数据。我们使用GLMM对2017-2022年和2019-2022年数据进行逻辑回归,研究了与非抑制VL(VL≥200拷贝/mL)和大流行期间没有门诊就诊相关的因素,分别。
    在2351名活跃参与者中,76.0%为男性,57.6%年龄≥50岁,40.7%的非西班牙裔白人,38.2%非西班牙裔黑人,17.3%西班牙裔/拉丁裔,51.0%的公众保险。从2020年到2022年年中,每月的面对面和远程医疗就诊率各不相同。多变量逻辑回归显示,没有遇到的人更可能是男性或VL≥200拷贝/mL。对于具有≥1个VL测试的参与者,2020年HIVVL≥200拷贝/mL的患病率接近2014年至2019年的患病率.病毒抑制概率的变化与参与者的年龄无关,性别,种族/民族或保险类型。
    在大流行期间,由于远程医疗和面对面活动的变化,这些接触在过去的两年中有所减少,与病毒抑制的相对维持。从COVID-19对门诊护理的影响中持续恢复将需要继续努力,以改善保留率和患者获得医疗服务的机会。
    This article aimed at analyzing the acute impact and the longer-term recovery of COVID-19 pandemic effects on clinical encounter types, HIV viral load (VL) testing, and suppression (HIV VL < 200 copies/mL). This study was a longitudinal cohort study of participants seen during 2019-2022 at nine HIV Outpatient Study (HOPS) sites. Generalized linear mixed models (GLMMs) estimated monthly rates of all encounters, office and telemedicine visits, and HIV VL tests using 2010-2022 data. We examined factors associated with nonsuppressed VL (VL ≥ 200 copies/mL) and not having ambulatory care visits during the pandemic using GLMM for logistic regression with 2017-2022 and 2019-2022 data, respectively. Of 2351 active participants, 76.0% were male, 57.6% aged ≥ 50 years, 40.7% non-Hispanic White, 38.2% non-Hispanic Black, 17.3% Hispanic/Latino, and 51.0% publicly insured. The monthly rates of in-person and telemedicine visits varied during 2020 through mid-year 2022. Multivariable logistic regression showed that persons with no encounters were more likely to be male or have VL ≥ 200 copies/mL. For participants with ≥1 VL test, the prevalence rate of HIV VL ≥ 200 copies/mL during 2020 was close to the rates from 2014 to 2019. The change in probability of viral suppression was not associated with participant\'s age, sex, race/ethnicity, or insurance type. In the HOPS, overall patient encounters declined over 2 years during the pandemic with variations in telemedicine and in-person events, with relative maintenance of viral suppression. Ongoing recovery from the impact of COVID-19 on ambulatory care will require continued efforts to improve retention and patient access to medical services.
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  • 文章类型: Preprint
    背景使用兴奋剂的患有HIV的性少数男性(SMM)可能会在抗逆转录病毒治疗依从性方面遇到更大的困难,这增加了未抑制的HIV病毒载量(VL)的风险。VL的远程监控可以支持快速响应次优依从性的努力。方法这项定性研究招募了24名HIVSMM,他们使用兴奋剂检查使用两种不同的干血点(DBS)自我采样设备的经验(即,塔索-M20vs.HemaSpotHD)来测量VL。参与者被要求使用两种设备完成DBS的自采样,然后参加了45分钟的半结构化面试。面试的重点是易用性,设备首选项,接收和邮寄工具包的经验,以及参与研究的障碍。进行了主题分析以分析访谈笔录。结果22名参与者(92%)返回了Tasso-M20,21名(88%)返回了HemaspotHD设备。在完成定性访谈的22名参与者中,确定了23个代码,并在七个主题内崩溃。设备的偏好基于便利性,疼痛和手指刺痛技术的经验。与会者强调,关于星展银行自我抽样的应急计划的更明确指示将改善星展银行自我抽样的用户体验。交叉柱头(例如,艾滋病毒,性少数群体地位,和物质使用)被认为是实施DBS自采样的重要考虑因素。促进决策,或根据个人喜好选择抽样方法的选项,可以提高参与和完成DBS的可能性。结论研究结果将指导DBS自采样的更广泛实施,以优化使用兴奋剂的HIV的SMM中的VL监测。
    UNASSIGNED: Sexual minority men (SMM) with HIV who use stimulants may experience greater difficulties with antiretroviral therapy adherence which amplifies risk for unsuppressed HIV viral load (VL). Remote monitoring of VL could support efforts to rapidly respond to sub-optimal adherence.
    UNASSIGNED: This qualitative study enrolled 24 SMM with HIV who use stimulants to examine experiences with two different dried blood spots (DBS) self-sampling devices (i.e., Tasso-M20 vs. HemaSpot HD) to measure VL. Participants were asked to complete self-sampling of DBS using both devices, and then participated in a 45-minute semi-structured interview. Interviews focused on ease of use, device preference, experiences with receiving and mailing kits, and barriers to participating in research. A thematic analysis was conducted to analyze interviews transcripts.
    UNASSIGNED: Twenty-two participants (92%) returned the Tasso-M20 and 21 (88%) returned the Hemaspot HD devices. Among the 22 participants that completed qualitative interviews, twenty-three codes were identified and collapsed within seven themes. Preferences for devices were based on convenience, pain and prior experiences with finger-pricking technology. Participants emphasized that clearer instructions with contingency plans for self-sampling of DBS would improve the user experience with self-sampling of DBS. Intersectional stigma (e.g., HIV, sexual minority status, and substance use) was noted as an important consideration in implementing self-sampling of DBS. Promoting decision making, or the option to choose sampling method based on personal preferences, may improve engagement and likelihood of DBS completion.
    UNASSIGNED: Findings will guide the broader implementation of self-sampling of DBS to optimize VL monitoring in SMM with HIV who use stimulants.
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  • 文章类型: Journal Article
    背景艾滋病的严重程度以及HIV的社会和个人影响使HIV的流行病学研究更加困难。监测研究仍然是了解艾滋病毒感染趋势的主要手段。在这项研究中,我们的目的是确定过去9年期间在印度西部地区我们医院就诊的产前妇女中HIV的流行趋势,以及通过产前HIV检测确定的一组阳性患者的ART依从性和病毒载量.方法从2015年1月至2023年12月,从医院的PPTCT(预防父母至儿童传播)中心和ART(抗逆转录病毒治疗)中心收集了9年的数据,进行了回顾性研究。根据印度国家艾滋病控制组织(NACO)指南,所有在产前诊所就诊并进入劳动室的孕妇都应接受艾滋病毒检测。收集了接受艾滋病毒检测咨询的产前妇女总数和艾滋病毒检测呈阳性的数据。得出了HIV患病率,并确定了在研究期间住院的产前妇女中HIV患病率的趋势。收集并分析了这些在产前检测到的HIV阳性妇女及其血清阳性配偶和子女的ART依从性和病毒载量的数据。结果在研究期间,共有22,584名产前妇女接受了HIV检测咨询。没有妇女选择退出,对这22,584名产前妇女进行了100%的艾滋病毒检测。50名妇女产前艾滋病毒检测呈阳性,在研究期间,总体艾滋病毒感染率为0.22%(50/22,584)。从2020年到2023年,产前妇女的艾滋病毒感染率呈下降趋势(从0.37%下降到0.19%)。在50名产前血清阳性的妇女中,42仍在我们的ART中心预订治疗。30名(71%)妇女仍坚持服用ART。在他们的20个血清反应阳性的配偶中,14人(70%)仍然坚持ART。28名(93%)接受ART的女性患者和13名(93%)接受ART的配偶抑制了病毒载量。这些血清反应呈阳性的母亲的两个孩子的艾滋病毒检测呈阳性。在两个血清阳性儿童中均观察到ART依从性和抑制的病毒载量。结论该研究反映了近年来本地区产前血清阳性率的下降。产前艾滋病毒流行趋势对母婴传播具有重大影响,这些积极的产前病例是指征病例,为所谓的非高风险人群提供了检测机会。积极的女性患者的ART依从性,产前期结束后,仍然是我们地区的挑战,这需要改善外展活动,并提高这些患者对终身接受ART的重要性的动机和认识。
    Background The severity of AIDS and the social and personal implications of HIV makes the epidemiological study of HIV more difficult. Surveillance studies remain the mainstay of understanding the trends of HIV infection. In this study, we aimed to determine the trend in the prevalence of HIV in the antenatal women attending our hospital situated in the western region of India over the period of the last nine years and the ART adherence and the viral loads of the cluster of positive patients identified from this antenatal HIV testing. Methodology A retrospective study was conducted by collecting data for nine years from January 2015 to December 2023 from the PPTCT (Prevention of Parent to Child Transmission) Centre and ART (Anti-Retroviral Treatment) Centre of the hospital. All pregnant women attending antenatal clinics and being admitted to the labor room are counseled for HIV testing as per the National AIDS Control Organisation (NACO) guidelines of India. The data of the total antenatal women counseled for HIV testing and who tested HIV positive were collected. The HIV prevalence rate was derived and the trend of HIV prevalence in antenatal women attending the hospital was determined over the study period. The data on ART adherence and the viral load of these HIV-positive women detected antenatally and their seropositive spouse and children were collected and analyzed. Results A total of 22,584 antenatal women were counseled for HIV testing during the study period. No women opted out and there was 100% testing of these 22,584 antenatal women for HIV. Fifty antenatal women tested positive for HIV, resulting in an overall HIV prevalence of 0.22% (50/22,584) during the study period. There was a declining trend of HIV prevalence among antenatal women from 2020 to 2023 (from 0.37% to 0.19%). Of the 50 seropositive antenatal women, 42 remained booked at our ART Centre for treatment. Thirty (71%) women are still adhered to taking ART. Of their 20 seropositive spouses, 14 (70%) have remained adhered to ART. Twenty-eight (93%) female patients on ART and 13 (93%) spouses on ART have suppressed viral loads. Two children of these seropositive mothers had tested HIV positive. ART adherence and suppressed viral load were seen in both seropositive children. Conclusion The study reflects a decline in antenatal seroprevalence in recent years in our region. The antenatal HIV prevalence trends have major implications on mother-to-child transmission and these positive antenatal cases serve as index cases bringing the testing opportunity for the so-called identified as the non-high-risk population. ART adherence of positive female patients, after the completion of the antenatal period, remains the challenge in our region, which requires improvement in the outreach activities and increased motivation and awareness of these patients regarding the importance of taking lifelong ART.
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  • 文章类型: Journal Article
    赞比亚的成人艾滋病毒感染率高达11%,在实现艾滋病规划署95-95-95目标方面面临挑战。全国86.2%的病毒载量抑制低于所需的95%。西北省的病毒载量抑制最低,为77.5%。我们的研究调查了综合样本转诊系统在优化该省HIV病毒载量覆盖率和早期婴儿诊断周转时间中的作用。使用来自DISA实验室信息系统和Smartcare的电子数据,进行了回顾性横断面分析,涉及160,922个病毒载量和早期婴儿诊断结果。采用卡方检验和多元线性回归进行分析。在实施集成样本转介系统之后,病毒载量覆盖率每月持续增加(p<0.001),早期婴儿诊断周转时间提高了47.7%,样品量增加了25%。该研究确定了各种因素与测试结果之间的关联。这些发现表明病毒载量覆盖率和早期婴儿诊断周转时间的改善,并建议针对可修改的因素进一步优化转诊系统。我们建议继续加强转介系统,并更加审慎地制定创造需求的实施战略。
    Zambia\'s adult HIV prevalence is high at 11% and faces challenges in achieving UNAIDS 95-95-95 targets for HIV, with a national viral load suppression of 86.2% falling short of the required 95%. North-Western Province has the lowest viral load suppression at 77.5%. Our study investigated the role of an integrated sample referral system in optimizing HIV viral load coverage and Early Infant Diagnosis turnaround time in the province. Using electronic data from the DISA Laboratory Information System and Smartcare, a retrospective cross-sectional analysis was conducted, involving 160,922 viral load and Early Infant Diagnosis results. The chi-square test and multiple linear regression were used for analysis. Following the implementation of the integrated sample referral system, viral load coverage consistently increased monthly (p < 0.001), Early Infant Diagnosis turnaround time improved by 47.7%, and sample volume increased by 25%. The study identifies associations between various factors and testing outcomes. These findings demonstrate improvements in viral load coverage and the Early Infant Diagnosis turnaround time and suggest targeting modifiable factors to further optimize the referral system. We recommend continued strengthening of the referral system and more deliberate demand-creation implementation strategies.
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  • 文章类型: Journal Article
    脑脊液(CSF)中人类免疫缺陷病毒(HIV)RNA设定点的个体差异及其决定因素知之甚少,但与HIV神经病理学有关,大脑蓄水池,病毒逃逸,抗逆转录病毒中断后重新播种。纵向多中心人口学研究,临床,在2000年随访中,来自597名HIV(PWH)脱离抗逆转录病毒治疗(ART)且血浆HIVRNA>定量下限(LLQ)的患者的CSFHIVRNA的实验室相关性。还通过混合效应模型评估了与CSF对照(CSFC;CSFHIVRNALLQ)和CSF/血浆不一致(CSF>血浆HIVRNA>LLQ)相关的因素。对持续性CSFC和ART初治参与者进行了研究后和敏感性分析,分别。平均随访2.1年,CSFHIVRNA与CD4+和CD8+T细胞相关,CSF白细胞,血脑屏障(BBB)完整性,铁和脂质代谢的生物标志物,血清球蛋白,过去接触过拉米夫定,和血浆HIVRNA(模型p<0.0001)。CSFC(持续3年的7.7%)和CSF/血浆不一致(持续1年的<0.01%)与相同的参数可变相关(模型p<0.001)。敏感性分析证实了以前从未接触过ART的参与者中的大多数关联。持续CSFC与较高的CD4+T细胞计数最低点相关(p<0.001),降低血清球蛋白(p=0.003),和较低的CSF白细胞(p<0.001)。没有艺术,13个PWH中有1个持续检测不到CSFHIVRNA,而多年来持续的CSF/血浆不一致极为罕见。免疫反应,炎症,BBB通透性,铁和脂质代谢均与CSF中HIV的复制有关。
    Interindividual variation of human immunodeficiency virus (HIV) RNA setpoint in cerebrospinal fluid (CSF) and its determinants are poorly understood, but relevant for HIV neuropathology, brain reservoirs, viral escape, and reseeding after antiretroviral interruptions. Longitudinal multicentric study on demographic, clinical, and laboratory correlates of CSF HIV RNA in 2000 follow-up visits from 597 people with HIV (PWH) off antiretroviral therapy (ART) and with plasma HIV RNA > the lower limit of quantification (LLQ). Factors associated with CSF control (CSFC; CSF HIV RNA < LLQ while plasma HIV RNA > LLQ) and with CSF/plasma discordance (CSF > plasma HIV RNA > LLQ) were also assessed through mixed-effects models. Posthoc and sensitivity analyses were performed for persistent CSFC and ART-naïve participants, respectively. Over a median follow-up of 2.1 years, CSF HIV RNA was associated with CD4+ and CD8+ T cells, CSF leukocytes, blood-brain barrier (BBB) integrity, biomarkers of iron and lipid metabolism, serum globulins, past exposure to lamivudine, and plasma HIV RNA (model p < 0.0001). CSFC (persistent in 7.7% over 3 years) and CSF/plasma discordance (persistent in <0.01% over 1 year) were variably associated with the same parameters (model p < 0.001). Sensitivity analyses confirmed most of the previous associations in participants never exposed to ART. Persistent CSFC was associated with higher CD4+ T-cell count nadir (p < 0.001), lower serum globulins (p = 0.003), and lower CSF leukocytes (p < 0.001). Without ART, one in 13 PWH had persistently undetectable CSF HIV RNA, while persistent CSF/plasma discordance was extremely rare over years. Immune responses, inflammation, BBB permeability, and iron and lipid metabolism were all associated with HIV replication in CSF.
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  • 文章类型: Journal Article
    艾滋病毒病毒载量自测可以使艾滋病毒感染者(PLHIV)更容易地监测他们的病毒抑制状态,可能促进药物依从性和安全行为决策。基于智能手机的病毒载量测试创新有可能覆盖资源有限和脆弱的社区,以解决获得艾滋病毒护理方面的不平等问题。然而,这些测试的成功开发和翻译需要对最终用户上下文进行有意义的调查,并在设计过程的早期结合这些特定于上下文的需求。这项研究的目的是让PLHIV和HIV医疗保健提供者参与以人为中心的设计研究,以告知基于智能手机的HIV病毒载量自测设备原型的关键设计和实施注意事项。
    对印第安纳州的PLHIV(n=10)和HIV提供者(n=4)进行了半结构化深入访谈,一个病毒抑制率欠佳的州,在获得艾滋病毒护理方面存在明显差异。面试指南是基于上下文调查和以人为中心的设计框架开发的,其中包括带有反馈收集问题的设备原型演示。
    对访谈记录的主题分析揭示了重要的好处,关注,以及用户对基于智能手机的HIVVL自我检测的要求,在PLHIV生活经验的背景下,知识,以及印第安纳州的护理障碍。
    最终用户的需求和偏好被确定为关键的设计规范和实施考虑因素,以促进可接受性,并为正在进行的HIVVL监测设备原型的开发和最终的真实世界翻译提供信息。
    UNASSIGNED: HIV viral load self-testing could enable people living with HIV (PLHIV) to monitor their viral suppression status more easily, potentially facilitating medication adherence and safe behavior decision-making. Smartphone-based viral load testing innovations have the potential to reach resource-limited and vulnerable communities to address inequities in access to HIV care. However, successful development and translation of these tests requires meaningful investigation of end-user contexts and incorporation of those context-specific needs early in the design process. The objective of this study is to engage PLHIV and HIV healthcare providers in human-centered design research to inform key design and implementation considerations for a smartphone-based HIV viral load self-testing device prototype in development.
    UNASSIGNED: Semi-structured in-depth interviews were conducted with PLHIV (n = 10) and HIV providers (n = 4) in Indiana, a state with suboptimal viral suppression rates and marked disparities in access to HIV care. Interview guides were developed based on contextual investigation and human-centered design frameworks and included a demonstration of the device prototype with feedback-gathering questions.
    UNASSIGNED: Thematic analysis of interview transcripts revealed important benefits, concerns, and user requirements for smartphone-based HIV VL self-testing within the context of PLHIV lived experience, knowledge, and barriers to care in Indiana.
    UNASSIGNED: End-user needs and preferences were identified as key design specifications and implementation considerations to facilitate the acceptability and inform ongoing development and ultimately real-world translation of the HIV VL monitoring device prototype.
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  • 文章类型: Journal Article
    现场护理(POC)技术-包括HIV病毒载量(VL)监测-正在全球范围内扩展,包括在资源有限的设置中。建模可以使决策者考虑最佳策略,以最大程度地覆盖和访问,最小化周转时间(TAT),用有限的机器降低成本。通过形成性定性焦点小组讨论,与利益相关者讨论模型输入,输出,和格式,我们创建了一个包含排队论的优化模型,并使用整数规划方法对其进行求解,以反映基苏木县的HIVVL监测,肯尼亚。我们对样品处理的3种情况进行了建模:1)仅集中实验室,2)具有7个现有POC“集线器”设施的集中式实验室,3)集中式实验室,现有7个和1-7个新的“集线器”设施。我们使用场景1的现有推荐网络计算总TAT,并通过最小化场景2和3的TAT来求解最佳推荐网络。我们进行了单向敏感性分析,包括每个县的分配公平。通过两个焦点小组,利益相关者认可了临时选择的模型投入,输出,和在模型构建过程中包含修改的格式。在所有三种情况下,TAT的最大组成部分是在工厂等待样品分批和运输的时间(方案1-3:78.7%,89.9%,91.8%)和在测试地点的等待时间(18.7%,8.7%,7.5%);运输时间对整体时间的贡献最小(2.6%,1.3%,0.7%)。在方案1中,平均TAT为39.8小时(SD:2.9),样品在VL处理系统中累计花费1,077小时。在方案2中,平均TAT降至33.8小时(SD:4.8),总计430小时。在场景3中,平均TAT随着每台新机器几乎单调地减少到31.1小时(SD:8.4)和总共346小时。样本批处理的频率和处理速率对TAT的影响最大;包含分配公平性对TAT的影响最小。总之,利益相关者知情的资源分配模型确定了最佳的POCVL中心分配和转诊网络。使用现有的-并添加新的-POC机器可以显着降低TAT,也可以进行操作更改。
    Point-of-care (POC) technologies-including HIV viral load (VL) monitoring-are expanding globally, including in resource-limited settings. Modelling could allow decision-makers to consider the optimal strategy(ies) to maximize coverage and access, minimize turnaround time (TAT) and minimize cost with limited machines. Informed by formative qualitative focus group discussions with stakeholders focused on model inputs, outputs and format, we created an optimization model incorporating queueing theory and solved it using integer programming methods to reflect HIV VL monitoring in Kisumu County, Kenya. We modelled three scenarios for sample processing: (1) centralized laboratories only, (2) centralized labs with 7 existing POC \'hub\' facilities and (3) centralized labs with 7 existing and 1-7 new \'hub\' facilities. We calculated total TAT using the existing referral network for scenario 1 and solved for the optimal referral network by minimizing TAT for scenarios 2 and 3. We conducted one-way sensitivity analyses, including distributional fairness in each sub-county. Through two focus groups, stakeholders endorsed the provisionally selected model inputs, outputs and format with modifications incorporated during model-building. In all three scenarios, the largest component of TAT was time spent at a facility awaiting sample batching and transport (scenarios 1-3: 78.7%, 89.9%, 91.8%) and waiting time at the testing site (18.7%, 8.7%, 7.5%); transportation time contributed minimally to overall time (2.6%, 1.3%, 0.7%). In scenario 1, the average TAT was 39.8 h (SD: 2.9), with 1077 h that samples spent cumulatively in the VL processing system. In scenario 2, the average TAT decreased to 33.8 h (SD: 4.8), totalling 430 h. In scenario 3, the average TAT decreased nearly monotonically with each new machine to 31.1 h (SD: 8.4) and 346 total hours. Frequency of sample batching and processing rate most impacted TAT, and inclusion of distributional fairness minimally impacted TAT. In conclusion, a stakeholder-informed resource allocation model identified optimal POC VL hub allocations and referral networks. Using existing-and adding new-POC machines could markedly decrease TAT, as could operational changes.
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  • 文章类型: Journal Article
    HIV病毒载量(VL)测试在HIV的临床管理中起着关键作用,作为依从性和抗逆转录病毒疗效的标志。迄今为止,国家和国际抗逆转录病毒治疗建议已经演变为认可常规VL检测。自2004年以来,南非(SA)建议进行常规VL测试。逐步,由国家卫生实验室服务(NHLS)管理的集中式HIVVL计划经历了广泛的增长。对2013年至2022年的回顾性去识别VL数据进行了评估,以审查计划执行情况。测试量从2013年的1,961,720增加到2022年的45,334,864。实验室总周转时间(TAT)的中位数为94h(2015年)至51h(2022年)。两个新检测方法的实施改善了所有实验室的平均TAT。VL大于1000拷贝/mL的样品稳定下降。尽管最初的增长,少于50拷贝/毫升的样本从2019年开始停滞在约70%,2022年下降到68%。观察到测定之间的一些变化。总的来说,SAVL程序成功。VL计划的规模,在某种程度上是世界上同类中最大的,为未来的公共卫生计划提供课程,这些计划依赖于实验室进行患者预后和计划绩效监测。
    HIV viral load (VL) testing plays a key role in the clinical management of HIV as a marker of adherence and antiretroviral efficacy. To date, national and international antiretroviral treatment recommendations have evolved to endorse routine VL testing. South Africa (SA) has recommended routine VL testing since 2004. Progressively, the centralised HIV VL program managed by its National Health Laboratory Service (NHLS) has undergone expansive growth. Retrospective de-identified VL data from 2013 to 2022 were evaluated to review program performance. Test volumes increased from 1,961,720 performed in 2013 to 45,334,864 in 2022. The median total in-laboratory turnaround time (TAT) ranged from 94 h (2015) to 51 h (2022). Implementation of two new assays improved median TATs in all laboratories. Samples of VL greater than 1000 copies/mL declined steadily. Despite initial increases, samples of fewer than 50 copies/mL stagnated at about 70% from 2019 and declined to 68% in 2022. Some variations between assays were observed. Overall, the SA VL program is successful. The scale of the VL program, the largest of its kind in the world by some margin, provides lessons for future public health programs dependent on laboratories for patient outcome and program performance monitoring.
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