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The overall aim of this study was to understand the determinants of VCT uptake in the general population of Nigeria’s federal capital territory of Abuja. Uptake of VCT still remains low despite increased availability of VCT information and services in Abuja, Nigeria. A quantitative cross-sectional study was undertaken with 180 respondents from Abuja, using an adaptation of the Health Belief Model as conceptual framework, to elucidate the social demographics of respondents, their HIV/VCT knowledge, their perceptions of VCT facility design, societal support for VCT, and how HIV stigma shapes the phenomenon of VCT uptake in Abuja, Nigeria. The key findings were that a better understanding of HIV prevention, a perception of support from community and religious leaders, and access to HIV test services in government facilities are positive predictors of higher VCT uptake. Poor personal risk assessment and the cost of HIV testing were identified as the key barriers to VCT access. / Health Studies / M.P.H.

Volunteer caregivers provide essential services to people in the terminal stages of AIDS and their families. Volunteers are exposed to stress and burnout. This study investigated the relationships between stress, coping strategies, levels of burnout and resilience in this population. Volunteers from Societas ‘O Sosiale (SOS) Children Villages and community based organisation (CBO) partnerships, were selected using non-probability purposive convenience sampling. A total of 110 participants were given the Experience of Work and Life Circumstances Questionnaire (WLQ), Brief-Cope, Maslach’s Burnout Inventory (MBI), a Resilience scale and the Living Standard Measure to complete. Statistical analyses were performed on the data. This includes descriptive statistics, reliability analysis, factor analysis, correlations and multivariate analysis of variance. The study found that volunteer caregivers experience high stress levels and burnout related to stressors outside work, remuneration, personnel policies and high resilience. High burnout is associated with all forms of coping. Further it is shown that training in problem-solving skills, counselling, government and public lobbying for support, registration with relevant professional bodies, furnished offices, reasonable recruitment requirements and compensation are needed to help the care givers avert the effect of stressors and control stress by stopping it from turning to burnout. / Psychology / M.A. (Psychology - Research Consultation)

The study explored the factors influencing the use of voluntary counselling and testing by university students. This was done by undertaking an exploratory and descriptive qualitative study. Focus group discussions and field notes were used to collect data from the participants. Outcomes from the study revealed various factors to the uptake of Voluntary Counselling and Testing (VCT) services by university students namely: the desire to know one‟s HIV status, illness, pregnancy, blood donation, to get a reward, the influence of significant others, the influence of media, awareness campaigns, compulsion, to get a job, curiosity, to be a positive role model and the positive attitude and professional conduct of the health care provider. The study also revealed various challenges to the uptake of VCT services by university students namely: the fear of being diagnosed HIV positive, HIV/AIDS-related stigma and discrimination, the low perception of risk to HIV infection, the lack of student friendly VCT services, the shortage of human and infrastructural resources, the inaccessibility of VCT services, the long waiting period for test results, negative perceptions about VCT, the problems with pre-test counselling and ignorance. Going by the participants‟ suggestions VCT services uptake by university students could be improved by increased resource allocation (incentives, human and infrastructural resources), increased awareness campaigns, and improved counselling and making VCT services more accessible / Information Science / MA (Public Health)

Thesis (PhD)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: Due to a lack of research, which, in turn, resulted in a shortage of applicable literature that focused on the experiences and socio-emotional needs of family members as carers of AIDS-patients, the researcher decided to undertake this research project. The aim of this was to investigate the experiences and socio-emotional needs of family members as AIDS care givers. To lead the research, the researcher made use of a qualitative research approach. Attention was also given to the description of HIV/AIDS, as well as the prevention and treatment of HIV/AIDS. The impact of HIV/AIDS was also given attention, and it was done from an ecological perspective. Within the qualitative research paradigm a phenomenological, explorative, descriptive and contextual research design was utilised. The boundaries for data collection were delineated to the George area. Semi-structured interviews were conducted with family members who acted as primary care givers of AIDS-patients who were recruited by means of purposive sampling and the snowball sampling technique. The data collected were analysed according to the steps for qualitative data analysis as proposed by Tesch (in Cresswell, 1994). To ensure the trustworthiness of the research findings, data verification was executed according to Guba’s model (in Krefting, 1991). The following twelve themes emanated from the process of data analysis: - Knowledge of the disease - Caring for people with AIDS - Risky behaviour - Other people’s reactions - Care givers’ feelings and reactions - Support that was received with the care giving - Effect of the care giving on the relationship between the care giver and the patient - Changes in the care givers’ life because of the care giving of AIDS patients - Experiences regarding the dying process - Needs regarding the caring of the patient - Services that are needed - Advice from the participants to other family members as AIDS care givers. The following recommendations were made based on the conclusions derived from the research findings: Information sessions by Social Workers in collaboration with the different clinics on certain days; a community based project to recruit volunteers to support family care givers on a regular basis; look at facilities, like old age homes and hospices, that can give respite for a week to three weeks; connect family care givers to support groups in the community; make use of the media to give information regarding HIV/AIDS to the broader community; a centralized food and clothes bank from which care givers can draw affordable food and clothes. An application for funding can be done at the Department of Social Development or the Department of Health. Another recommendation that is made is to investigate the possibility of a community based project that provides cleaning and washing services to family members as care givers, as well as the patients. This can even become a job creation project. Other recommendations are: to investigate an alternative form of transport that is wheelchair accessible and patient friendly; to train home based carers to help family members as AIDS care givers; to train home based carers to be of assistance with counseling of patients with regard to their medication; to train home based carers as AIDS care givers to help family members to reach out to other support services or groups; that care givers should be careful about expectations of other people and that they should be confident enough to verbalize their expectations; that Social Workers should investigate if the family member, as AIDS care giver, as well as the patient, gets the necessary support on all levels of the ecological perspective, and if not, he/she must look at ancillary sources and mobilize it to give support to the family care giver as well as to the patient; that professionals need to keep in mind the advice the participants was given to other family members as care givers when they are working with these families. A recommendation was also made to do a follow-up research on the same topic in the White, Indian and Black communities and especially that further emphasis should be placed on their needs, as participation by this population groups were scarce or could not be obtained at all. / AFRIKAANSE OPSOMMING: Weens ‘n gebrek aan navorsing, en gevolglik ook aan literatuur rakende die belewenisse en sosio-emosionele behoeftes van familielede as primêre VIGS-versorgers, het die navorser besluit om hierdie navorsingsprojek te onderneem. Die doel hiermee was om die belewenisse en sosio-emosionele behoeftes van familielede as primêre VIGS-versorgers te verken en te beskryf. Om die navorsing te rig, is ‘n kwalitatiewe navorsingsbenadering vir die doel gebruik. Aandag is ook gegee aan die beskrywing en voorkoms van MIV/VIGS, asook die voorkoming en behandeling van MIV/VIGS. Die impak van MIV/VIGS is ook breedvoerig bespreek en is dit vanuit ‘n ekologiese perspektief gedoen. Binne die kwalitatiewe navorsingsbenadering is daar van ‘n fenomenologiese, verkennende, beskrywende en kontekstuele navorsingsontwerp gebruik gemaak. Die grense vir data-insameling het binne die George-area geval. Semi-gestruktureerde onderhoude is gevoer met familielede wat as primêre VIGS-versorgers optree, en wat deur middel van ‘n doelgerigte steekproeftrekking en die sneeubaltegniek vir deelname aan die navorsing gewerf is. Die ingesamelde data is ontleed aan die hand van die agt stappe van kwalitatiewe data-ontleding van Tesch soos uiteengesit in Creswell (1994). Guba se model soos dit in Krefting (1991:214-221) uiteengesit is, is gebruik om die vertrouenswaardigheid van die navorsingsdata te verifieer. Twaalf temas het na aanleiding van die prosesse van data-ontleding na vore gekom, naamlik: - Kennis van die siektetoestand - Versorging van VIGS-lyers - Risiko-gedrag - Ander mense se reaksie - Versorger se gevoelens en reaksies - Ondersteuning wat ontvang is met die versorging - Effek van pasiënt se versorging op die verhouding tussen versorger en pasiënt - Verandering van versorger se lewe as gevolg van die versorging van die VIGS-lyer - Belewenisse ten op sigte van die sterwensproses - Behoeftes ten opsigte van die versorging van die pasiënt - Dienste wat benodig word - Raad deur deelnemers aan ander familielede as VIGS-versorgers. Voortspruitend uit die navorsingsbevindinge, is tot sekere gevolgtrekkings gekom waaruit die volgende aanbevelings gemaak is: dat inligtingsessies deur maatskaplike werkers in samewerking met die verskillende klinieke op sekere dae gehou sal word; dat ‘n gemeenskapsprojek van stapel gestuur word om vrywilligers te werf wat op ‘n gereelde basis aan VIGS-versorgers ondersteuning bied; dat daar gekyk word na respite by ouetehuise of ‘n hospice vir ‘n tydperk van ongeveer drie weke om aan versorgers ‘n ruskans te gee; dat versorgers betrek word by ondersteuningsgroepe in die gemeenskap; dat die media gebruik word om inligting oor VIGS aan die breë gemeenskap deur te gee; dat aandag gegee word aan ‘n gesentraliseerde voedsel- en klerebank waarvandaan versorgers voorraad kan onttrek. Aansoek vir befondsing kan gedoen word by Departement Maatskaplike Ontwikkeling of Departement Gesondheid. Verdere aanbevelings wat gemaak kan word, is: dat ‘n gemeenskapsprojek van stapel gestuur word om skoonmaakdienste en hulp met wasgoed was tot die beskikking van die VIGS-versorger te stel wat selfs as ‘n werkskeppingsprojek begin kan word; dat ‘n alternatiewe vorm van vervoer wat deur die familielid en pasiënt benut kan word, en wat geskik is vir pasiënt vervoer, ondersoek sal word; dat opleiding van tuisversorgers as hulp vir familielede as VIGS-versorgers aandag sal kry; dat opleiding van tuisversorgers om behulpsaam te wees met berading van pasiënte rakende hulle medikasie dringende aandag sal geniet; dat familielede as VIGS-versorgers uitreik na ander ondersteuningsbronne vir hulp; dat versorgers versigtig sal wees ten opsigte van verwagtinge van ander, maar dat hulle ook vrymoedigheid sal neem om hulle verwagtinge te verbaliseer; dat die maatskaplike werker sal ondersoek instel of die familielid as primêre VIGS-versorger, sowel as die pasiënt, vanuit al die vlakke van die ekologiese perspektief die nodige ondersteuning geniet, en indien nie, moet daar gekyk word na hulpbronne en dit moet gemobiliseer word ten einde hierdie noodsaaklike ondersteuning te bied; dat die raad wat deur die deelnemers aan die navorsing aan ander familielede as VIGS-versorgers voorsien is, in gedagte gehou sal word wanneer met hierdie families gewerk word. ‘n Aanbeveling is ook gemaak dat opvolg navorsing oor dieselfde onderwerp gedoen word onder die Wit, Indiër en Swart gemeenskappe, en dat veral klem gelê word op hulle behoeftes, aangesien deelname vanuit hierdie bevolkingsgroepe skraal was, of glad nie bekom kon word nie.

Thesis (M Social Work)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: The South African government has laws and policies that forbid discrimination against individuals. These policies protect people from being discriminated against in the workplace due to sickness, race and many other factors. Discrimination against people living with HIV/AIDS has caused many people who suffer from this disease not to come forward with their illness because they fear being discriminated against and stigmatised; some even lose their jobs because they are infected with HIV. People infected with HIV are discriminated against not only in the workplace but also in their communities and families. This implies that people living with HIV/AIDS need support from all levels of society in order to live positive lives, which may lead infected people to live longer. This study explored HIV/AIDS as terminal illness and the stressors experienced by people infected with the virus. This was done by examining the support available to people living with HIV/AIDS, as well as identifying the support needed by these people. By adopting an ecological approach to the study, the need for support could be investigated on multiple levels. A combination of a quantitative and qualitative research design was used in the study. Data were gathered by means of a semi-structured interview schedule that was administered during individual interviews with service providers. This allowed for data that were both measurable as well as rich in description to be collected. The questions in the semi-structured questionnaire were based on the information retrieved from the literature review. The findings from the empirical investigation revealed that people living with HIV/AIDS receive limited support from their families, the South African government and society at large. The findings further indicated that informal sources of support such as family, friends and partners are relatively supportive of people living with HIV/AIDS. However, the relationships between people living with HIV/AIDS and their families and partners are often strained, especially when a person first discovers his or her status as HIV positive. Furthermore, people living with HIV/AIDS are stigmatised on multiple levels because of their status. There is stigmatisation from family, friends, in the workplace and in the community. The most important recommendations resulting from the study are that services such as counselling are needed for people living with HIV/AIDS together with their families. This is of particular significance to the South African government, especially the health sector, which needs to improve the health care system. In addition, recommendations emphasise the importance of promoting education and awareness, which could have great value for people living with HIV/AIDS, their families and communities. Knowledge about HIV/AIDS would empower people at all levels to support those who live with the disease and would also be of great value in helping those living with the disease to contribute something of value towards their health condition. / AFRIKAANSE OPSOMMING: Die Suid-Afrikaanse regering beskik oor wette en beleide wat diskriminasie teen individue verbied. Hierdie wette en beleide beskerm mense teen diskriminasie in die werkplek, diskriminasie op grond van siekte, gestremdheid, ras en vele ander redes. Diskriminasie teen mense wat met MIV/vigs leef, laat baie van hulle hul MIV/vigs-status geheim hou omdat hulle diskriminasie en stigmatisasie vrees. Sommige verloor selfs hulle werk wanneer dit rugbaar word dat hulle aan MIV/vigs ly. Diegene met MIV/vigs ervaar egter nie net in die werkplek diskriminasie nie, maar ook in hul gemeenskappe en families. Dít impliseer dat mense met MIV/vigs op alle vlakke ondersteuning nodig het om ’n positiewe lewe te lei en daarmee hul lewensverwagting so ver moontlik te verleng. Hierdie studie het die stresfaktore van terminale MIV/vigs-lyers ondersoek. Daar is voorts ondersoek ingestel na die ondersteuning wat mense met MIV/vigs ontvang, sowel as die ondersteuning wat hulle nodig het. MIV/vigs-lyers se ondersteuningsbehoeftes op etlike vlakke is deur middel van ’n ekologiese navorsingsbenadering bepaal. ’n Kombinasie van ’n kwantitatiewe en kwalitatiewe navorsingsmetodologie is vir die studie gebruik. Data is met behulp van ’n semigestruktureerde vraelys ingesamel, wat gedurende individuele onderhoude met diensverskaffers afgeneem is. Sodoende kon meetbare sowel as hoogs beskrywende data ingesamel word. Die vrae in die semigestruktureerde vraelys was gegrond op die inligting uit die literatuuroorsig. Die bevindinge van die empiriese ondersoek toon dat mense wat met MIV/vigs leef beperkte ondersteuning van hul familie, die Suid-Afrikaanse regering en die groter samelewing ontvang. Die bevindinge dui voorts daarop dat informele ondersteuningsbronne, soos familie, vriende en lewensmaats, betreklik ondersteunend is teenoor diegene met MIV/vigs. Tog is die verhouding tussen MIV/vigs-lyers en hul families en lewensmaats ook dikwels onder druk, veral net nadat die persoon ontdek dat hy/sy MIV-positief is. Daarbenewens word mense met MIV/vigs op verskeie vlakke gestigmatiseer – deur hul familie, vriende, in die werkplek en die gemeenskap. Die belangrikste aanbeveling uit die studie handel oor die behoefte aan dienste soos berading vir mense wat met die virus leef, sowel as vir hul familie. Die aanbeveling behoort veral van belang te wees vir die Suid-Afrikaanse regering, en in die besonder die gesondheidsektor, wat hierdie behoefte in gedagte moet hou om die gesondheidsorgstelsel te verbeter. Ander aanbevelings beklemtoon die belang van meer opvoeding en bewusmaking, aangesien dit uiters waardevol kan wees vir mense met MIV/vigs, hul familie en gemeenskappe. Kennis oor MIV/vigs sal mense op alle vlakke bemagtig om diegene met die virus te ondersteun, terwyl dit MIV/vigs-lyers self ook sal help om hul eie gesondheidstoestand beter te bestuur.

Thesis (MBA)--University of Stellenbosch, 2010. / Since the first case was discovered in Africa in the late 80s, the HIV/AIDS epidemic has gradually increased at alarming proportions worldwide especially in sub-Saharan Africa which prompted the United Nations' World Health Organisation to declare it a global pandemic. This research undertakes to highlight the current composition of care given for HIV and Aids, and the strengths and weaknesses of such programmes. The aim of this is to establish a better home based care programme in Swakopmund, Namibia, for improving the quality of care as well as living conditions for the infected and affected. For this initiative to be of the highest quality there is need to pay special attention to various regional and national HIV/AIDS programmes and policies. As the HIV/AIDS epidemic continues to spread, organisations and communities are now considering engaging more programmatic approaches as sub-Saharan countries are looking for scaled-up responses and national strategies for home based care. Policy-makers and senior administrators must be involved in developing and monitoring home based care programmes, and the people who manage and run the programmes must share information and feedback with senior administrators. In this sense, policy and action are interrelated as each partner learns from and guides the other. The researcher saw the need to involve community members and home based care-givers in a participatory process to research this topic and engage them in a process on how to improve the programmes that already exist. 52 Pages.

Thesis (MEdPsych (Educational Psychology))--University of Stellenbosch, 2008. / The purpose of this study was to explore the effects of the asset-based approach through life skills facilitation with a learner with disability and affected by HIV and AIDS. The conceptual framework of the study was the HIV and AIDS pandemic, disability and the asset-based approach. I followed a qualitative research approach guided by a transformative paradigm and I used the action research design. I purposefully selected the case (a learner with disability and affected HIV and AIDS) and other participants (mother and community organisations) were identified in consultation with the learner and as the research process developed. Data collection consisted of semistructured interviews, observation, journals, capacity inventory and collage. Data were transcribed verbatim and open-coding were used to identify themes that emerged. Findings that emerged were viz. mobilisation of existing assets enhances and mobilises new assets; presence of positive emotions, agency and ownership were reported. These assets led to incidences of school and community engagement, with the participant as an asset in building, creating and strengthening other people, resources and systems. Previous feelings of dependency, powerlessness and hopelessness were replaced with increased confidence, empowerment and competence. I propose the incorporation of the asset-based approach within the life orientation curriculum and the construct asset-awareness as a more userfriendly term for use in the school context. Asset-awareness refers to the raising and advancement of knowledge about abilities, gifts and assets and the use or application thereof in practice.

人類免疫缺陷病毒 (HIV) 是人獲得性免疫缺陷綜合征 (愛滋病，AIDS) 的致病原，2010年全球有180萬人死於愛滋病，HIV/AIDS已成為全球健康的嚴重挑戰。人類免疫缺陷病毒與乙型肝炎病毒 (HBV) ，丙型肝炎病毒 (HCV) 的合併感染非常普遍，已演變成具有嚴重臨床後果的新健康問題。儘管對於人類免疫缺陷病毒的研究已有很大的進展，但由於受研究模型的限制，人體免疫系統對人類免疫缺陷病毒感染的應答，特別是對乙型肝炎病毒，丙型肝炎病毒與人類免疫缺陷病毒合併感染的免疫應答，仍值得進一步的闡明。 / 在本研究中，我們首先對深圳人類免疫缺陷病毒，乙型肝炎病毒，丙型肝炎病毒合併感染的流行情況進行研究。共選取914份人類免疫缺陷病毒感染者的血漿，經過對乙型肝炎病毒表面抗原 (HBsAg) 和抗丙型肝炎病毒抗體 (anti-HCV) 的檢測，發現10.9% (100/914) 的被檢測者是人類免疫缺陷病毒/乙型肝炎病毒合併感染，14.6% (133/914) 為人類免疫缺陷病毒/丙型肝炎病毒合併感染，3.7% (34/914) 為人類免疫缺陷病毒/乙型肝炎病毒/丙型肝炎病毒三重感染。多元邏輯回歸分析證明人類免疫缺陷病毒傳染的危險行為與合併感染顯著相關聯。大多數的人類免疫缺陷病毒/乙型肝炎病毒合併感染者都是通過性接觸感染人類免疫缺陷病毒，包括異性傳播與同性傳播 (95/100, 95%); 大多數的人類免疫缺陷病毒/丙型肝炎病毒合併感染者是靜脈注射吸毒者 (89/133, 66.9%); 人類免疫缺陷病毒/乙型肝炎病毒/丙型肝炎病毒三重感染者中，大多數是靜脈注射吸毒者 (28/34, 82.4%)。靜脈注射吸毒人群中，大部分是男性 (108/122, 88.5%)，約半數人的年齡介乎27至32歲 (56/122, 45.9%) 。有接近一半的經過血液和血液製品傳播人類免疫缺陷病毒的人是人類免疫缺陷病毒/丙型肝炎病毒合併感染者 (10/23, 43.5%) 。性別與人類免疫缺陷病毒感染的危險行為有顯著關係，大部份的靜脈注射吸毒者是男性。 / 進一步，我們利用酶聯免疫吸附測定法 (ELISA) 檢測深圳愛滋病陽性樣本血漿中白細胞介素27 (IL-27) 的濃度。結果顯示，對比健康參照者，人類免疫缺陷病毒單獨感染者，人類免疫缺陷病毒/乙型肝炎病毒合併感染者，人類免疫缺陷病毒/丙型肝炎病毒合併感染者的血漿IL-27濃度顯著升高。隨後我們進一步發現，人類免疫缺陷病毒單獨感染組，人類免疫缺陷病毒/乙型肝炎病毒，人類免疫缺陷病毒/乙型肝炎病毒/丙型肝炎病毒合併感染組之間的血漿IL-27濃度沒有顯著差異，而人類免疫缺陷病毒/丙型肝炎病毒合併感染組與人類免疫缺陷病毒/乙型肝炎病毒/丙型肝炎病毒三重感染組的血漿IL-27濃度差異顯著。我們還發現人類免疫缺陷病毒單獨感染組中，血漿IL-27濃度與CD4⁺ T 淋巴細胞數量顯著正相關 (r = 0.177, P = 0.034)。 / 我們進一步分析了人類免疫缺陷病毒和丙型肝炎病毒的病毒載量對血漿IL-27濃度的影響，發現HIV單獨感染組中人類免疫缺陷病毒載量與血漿IL-27濃度沒有顯著相關 (r = - 0.063, P = 0.679)，而人類免疫缺陷病毒/丙型肝炎病毒合併感染組中，人類免疫缺陷病毒載量與血漿IL-27濃度顯著正相關 (r = 0.362, P = 0.049)。人類免疫缺陷病毒/丙型肝炎病毒合併感染組中，人類免疫缺陷病毒載量與丙型肝炎病毒載量缺少顯著線性關聯 (r = - 0.072, P = 0.704)，而人類免疫缺陷病毒/丙型肝炎病毒合併感染組可根據人類免疫缺陷病毒與丙型肝炎病毒的病毒載量再細分成血漿IL-27濃度差異顯著的三組 (P = 0.014) ， 丙型肝炎病毒載量與血漿IL-27濃度缺少顯著關聯 (r = - 0.119, P = 0.530) 。 / 我們利用TaqMan®等位基因分型技術測定深圳男同性戀人群中IL-27 p28基因的單核苷酸多態性 (SNP)。結果顯示，人類免疫缺陷病毒感染組IL-27 p28 -964A/G 和4603G/A的基因型與健康男同性戀參照組的基因型沒有顯著差異， IL-27 p28 -964A/G 和4603G/A的等位基因比率也沒有顯著差異。結果也顯示，IL-27 p28 2905T/G的TG基因型可減少2.77倍的人類免疫缺陷病毒感染風險，等位基因G可減少2.72倍的人類免疫缺陷病毒感染風險。連鎖不平衡在IL-27 p28 -964A/G 和2905T/G 中存在 ( / 綜上所述， 在本研究中，我們首次調查了深圳人類免疫缺陷病毒，乙型肝炎病毒，丙型肝炎病毒合併感染的流行情況，並分析了合併感染的風險因素。 發現人類免疫缺陷病毒單獨感染者，人類免疫缺陷病毒/乙型肝炎病毒合併感染者， 及人類免疫缺陷病毒/丙型肝炎病毒合併感染者的血漿IL-27濃度比健康參照組顯著地升高；人類免疫缺陷病毒單獨感染組中，血漿IL-27濃度與CD4⁺ T淋巴細胞數量顯著正相關。人類免疫缺陷病毒/丙型肝炎病毒合併感染組中，人類免疫缺陷病毒載量與血漿IL-27濃度顯著正相關 (r = 0.362, P = 0.049)。分析深圳男同性戀人群IL-27 p28基因的單核苷酸多態性，發現IL-27 p28 2905T/G 與人類免疫缺陷病毒感染相關，GGG單型可降低男同性戀人群人類免疫缺陷病毒感染的風險。 / Human Immunodeficiency Virus (HIV) is the causative agent of Acquired Immunodeficiency Syndrome (AIDS); HIV/AIDS caused 1.8 million deaths world-widely in 2010 and became a major global health challenge. HIV co-infections with Hepatitis B virus (HBV), Hepatitis C virus (HCV) are common and have emerged into new health problems with severe clinical consequences. Since the discovery of HIV, massive progress in understanding of the pathogen has been achieved. Due to the restriction of research model, how human immune system responds to HIV infection, particularly, to HBV or HCV co-infections is still worthy further elucidation. / A cohort study was first conducted in Shenzhen regarding the seroprevalence of HBV, HCV infections among HIV-infected population. Totally 914 HIV positive individuals were recruited in the study and tested for HBsAg and anti-HCV antibodies. The results showed a 10.9% (100/914) HIV/HBV co-infection rate, 14.6% (133/914) HIV/HCV co-infection prevalence and 3.7% (34/914) HIV/HBV/HCV triple-infection prevalence. Multivariate logistic regression revealed that HIV transmission risk behavior was significantly associated with HIV, HBV, HCV co-infections. Most HIV/HBV co-infection cases got HIV through sexual contact including heterosexual and homosexual behaviors (95/100, 95%); while most HIV/HCV co-infection subjects were injection drug users (IDUs) (89/133, 66.9%). In the case of HIV/HBV/HCV triple-infection, IDUs accounted for a large ratio (28/34, 82.4%). Among IDUs, most of them were male (108/122, 88.5%) and nearly half were aged 27 to 32 years old (56/122, 45.9%). Near half people who got HIV through blood and blood products were HIV/HCV co-infected (10/23, 43.5%). Gender has a significant correlation with HIV risk behavior and most IDUs were male. / Next, we applied ELISA to test HIV positive clinical samples and proved that plasma interleukin-27 (IL-27) level was significantly elevated in HIV mono-infected, HIV/HBV co-infected and HIV/HCV co-infected subjects when compared with healthy controls. Later, we further revealed that plasma IL-27 titer was not significantly varied among HIV, HBV and HCV co-infections except between HIV/HCV co-infections and HIV/HBV/HCV triple-infections. We also observed a significant positive correlation between CD4⁺ T cell counts and plasma IL-27 titer within HIV mono-infected group (r = 0.177, P = 0.034). / We further analyzed the impact HIV and HCV viral loads on plasma IL-27 titer. We found there was no significant correlation between HIV viral load and IL-27 titer among HIV mono-infected individuals (r = - 0.063, P = 0.679); while a significant positive correlation was observed between HIV viral load and IL-27 titer in HIV/HCV co-infected individuals (r = 0.362, P = 0.049). In the case of HIV/HCV co-infection, there was no significant linear correlation between HIV and HCV viral loads (r = - 0.072, P = 0.704) but exist obvious subdivision of samples in terms of HIV and HCV viral loads with significant IL-27 titer variance (P = 0.014). No correlation was observed between HCV viral load and IL-27 titer (r = - 0.119, P = 0.530). / IL-27 p28 polymorphisms were genotyped with TaqMan® Allelic Discrimination Assay in Chinese men who have sex with men (MSM) population in Shenzhen and the results revealed that proportions of IL-27 p28 -964A/G and 4603G/A genotypes were not significantly different from the healthy controls; IL-27 p28 -964A/G and 4603G/A allele frequencies were similar between HIV positive MSM group and healthy control MSM group. Results also showed that for IL-27 p28 2905T/G polymorphism, TG genotype has a 2.77-fold decreased risk of HIV susceptibility and subjects with G allele has a 2.72-fold decreased risk of HIV susceptibility. Linkage disequilibrium (LD) coefficients were observed between IL-27 p28 -964A/G and 2905T/G ( / In conclusion, the seroprevalences of HBV and HCV infection among HIV positive population in Shenzhen were surveyed and risk factors associated with co-infections were analyzed. Plasma IL-27 titer was significantly elevated in HIV mono-infected, HIV/HBV co-infected and HIV/HCV co-infected individuals. IL-27 level was correlated with CD4⁺ T cell counts within HIV mono-infected people. A significant positive correlation was found between HIV viral load and IL-27 titer in HIV/HCV co-infected individuals (r = 0.362, P = 0.049). IL-27 p28 2905T/G was associated with individual susceptibility to HIV infection and haplotype GGG showed a protective role in restricting HIV infection in MSM population. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / He, Lai. / "October 2012." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2013. / Includes bibliographical references (leaves 135-155). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract also in Chinese. / Abstract (English) --- p.iii / Abstract (Chinese) --- p.vi / Acknowledgements --- p.ix / Contents --- p.x / List of Tables --- p.xv / List of Figures --- p.xvi / Abbreviations --- p.xvii / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Human Immunodeficiency Virus --- p.1 / Chapter 1.1.1 --- HIV virology --- p.1 / Chapter 1.1.1.1 --- HIV structure and genome organization --- p.1 / Chapter 1.1.1.2 --- HIV life cycle --- p.3 / Chapter 1.1.1.3 --- HIV genotypes --- p.5 / Chapter 1.1.2 --- HIV epidemiology --- p.6 / Chapter 1.1.2.1 --- Global HIV epidemiology --- p.6 / Chapter 1.1.2.2 --- HIV epidemiology in China --- p.9 / Chapter 1.1.3 --- HIV pathogenesis --- p.13 / Chapter 1.1.3.1 --- Natural history of HIV infection --- p.13 / Chapter 1.1.3.2 --- HIV transmission --- p.15 / Chapter 1.1.3.3 --- HIV tropism --- p.17 / Chapter 1.1.4 --- Immune responses to HIV infection --- p.19 / Chapter 1.1.4.1 --- Innate immune response --- p.19 / Chapter 1.1.4.2 --- Adaptive immune response --- p.21 / Chapter 1.1.5 --- Diagnosis --- p.24 / Chapter 1.1.6 --- HIV prevention --- p.25 / Chapter 1.1.7 --- Anti-HIV therapy --- p.25 / Chapter 1.1.8 --- Hepatitis B virus, Hepatitis C virus infection --- p.26 / Chapter 1.1.8.1 --- HBV infection natural history, diagnosis, disease progression and epidemiology --- p.26 / Chapter 1.1.8.2 --- HCV infection natural history, diagnosis, disease progression and epidemiology --- p.30 / Chapter 1.1.9 --- HIV, HBV, HCV co-infections --- p.32 / Chapter 1.2 --- Interleukin-27 --- p.36 / Chapter 1.2.1 --- Biology of IL-27 --- p.36 / Chapter 1.2.2 --- IL-27 on immune system --- p.37 / Chapter 1.2.3 --- IL-27 anti-tumor properties --- p.38 / Chapter 1.2.4 --- IL-27 antiviral features --- p.40 / Chapter 1.2.5 --- IL-27 with hepatitis --- p.41 / Chapter 1.3 --- Single-nucleotide polymorphisms (SNPs) --- p.42 / Chapter 1.3.1 --- Types of SNPs --- p.43 / Chapter 1.3.2 --- Functions of SNPs --- p.43 / Chapter 1.4 --- Objectives of the study --- p.45 / Chapter Chapter 2 --- Seroprevalence of HBV, HCV infection among HIV positive individuals in Shenzhen --- p.52 / Chapter 2.1 --- Introduction --- p.52 / Chapter 2.2 --- Materials and methods --- p.54 / Chapter 2.2.1 --- Study participants --- p.54 / Chapter 2.2.2 --- Measure of HBV, HCV seroprevalence --- p.55 / Chapter 2.2.3 --- Statistical analysis --- p.60 / Chapter 2.3 --- Results --- p.61 / Chapter 2.3.1 --- HIV infection in Shenzhen --- p.61 / Chapter 2.3.2 --- Seroprevalence of HBV, HCV infection among HIV positive individuals in Shenzhen --- p.61 / Chapter 2.4 --- Discussion --- p.65 / Chapter 2.4.1 --- HIV infection in Shenzhen --- p.65 / Chapter 2.4.2 --- HIV, HBV, HCV co-infections in Shenzhen --- p.68 / Chapter 2.4.3 --- Limitations of the study --- p.71 / Chapter Chapter 3 --- Upregulation of Interleukin-27 titer in HIV infected persons --- p.78 / Chapter 3.1 --- Introduction --- p.78 / Chapter 3.2 --- Materials and methods --- p.80 / Chapter 3.2.1 --- Study participants --- p.80 / Chapter 3.2.2 --- Measure of HIV, HBV, HCV infection --- p.80 / Chapter 3.2.3 --- Detection of IL-27 in plasma --- p.81 / Chapter 3.2.4 --- CD4 counting --- p.84 / Chapter 3.2.5 --- Statistical analysis --- p.84 / Chapter 3.3 --- Results --- p.84 / Chapter 3.3.1 --- Demographics of study participants --- p.84 / Chapter 3.3.2 --- Upregulation of IL-27 levels in HIV infected persons --- p.85 / Chapter 3.3.3 --- Correlation of plasma IL-27 titer with CD4⁺ T cell count --- p.86 / Chapter 3.4 --- Discussion --- p.86 / Chapter Chapter 4 --- Impact of HIV, HCV viral loads on Interleukin-27 titer among Antiretroviral Therapy- Naïve HIV positive Chinese --- p.95 / Chapter 4.1 --- Introduction --- p.95 / Chapter 4.2 --- Materials and methods --- p.96 / Chapter 4.2.1 --- Study participants --- p.97 / Chapter 4.2.2 --- HIV, HBV and HCV Serological assays --- p.97 / Chapter 4.2.3 --- CD4 counting --- p.97 / Chapter 4.2.4 --- Detection of plasma IL-27 --- p.98 / Chapter 4.2.5 --- Quantification of HIV, HCV viral loads --- p.98 / Chapter 4.2.6 --- Statistical analysis --- p.102 / Chapter 4.3 --- Results --- p.102 / Chapter 4.3.1 --- Demographics of study participants --- p.102 / Chapter 4.3.2 --- Plasma IL-27 was elevated in HIV-positive persons --- p.103 / Chapter 4.3.3 --- Correlation of IL-27 titer and CD4⁺ T cell count --- p.103 / Chapter 4.3.4 --- Correlation of HIV viral load and IL-27 titer --- p.104 / Chapter 4.3.5 --- Correlation of HCV viral load and IL-27 titer --- p.104 / Chapter 4.4 --- Discussion --- p.105 / Chapter Chapter 5 --- Association of Interleukin-27 polymorphisms with the susceptibility to HIV infection in a Chinese men who have sex with men population --- p.116 / Chapter 5.1 --- Introduction --- p.116 / Chapter 5.2 --- Materials and methods --- p.118 / Chapter 5.2.1 --- Study participants --- p.118 / Chapter 5.2.2 --- HIV screening --- p.118 / Chapter 5.2.3 --- Genomic DNA extraction --- p.119 / Chapter 5.2.4 --- IL-27 p28 -964A/G, 2905T/G and 4603G/A genotyping --- p.120 / Chapter 5.2.5 --- Statistical analysis --- p.121 / Chapter 5.3 --- Results --- p.122 / Chapter 5.3.1 --- Demographics of study participants --- p.122 / Chapter 5.3.2 --- IL-27 genotypes and allele frequencies in HIV MSM and healthy MSM controls --- p.122 / Chapter 5.3.3 --- LD analysis and haplotype analysis --- p.123 / Chapter 5.4 --- Discussion --- p.124 / Chapter Chapter 6 --- Summary and perspectives --- p.130 / Chapter 6.1 --- Summary --- p.130 / Chapter 6.2 --- Perspectives --- p.132 / Bibliography --- p.135