Philosophiae Doctor - PhD / The global impact of the converging dual epidemics of tuberculosis (TB) and human immunodeficiency virus (HIV) is one of the major public health challenges of our time, because in many countries, human immunodeficiency virus (HIV) and mycobacterium tuberculosis (TB) are among the leading causes of morbidity and mortality. It is found that infection with HIV increases the risk of reactivating latent TB infection, and HIV-infected individuals who acquire new TB infections have high rates of disease progression. Research has shown that these two diseases are enormous public health burden, and unfortunately, not much has been done in terms of modeling the dynamics of HIV-TB co-infection at a population level. In this thesis, we study these models and design and analyze robust numerical methods to solve them. To proceed in this direction, first we study the sub-models and then the full model. The first sub-model describes the transmission dynamics of HIV that accounts for behavior change. The impact of HIV educational campaigns is also studied. Further, we explore the effects of behavior change and different responses of individuals to educational campaigns in a situation where individuals may not react immediately to these campaigns. This is done by considering a distributed time delay in the HIV sub-model. This leads to Hopf bifurcations around the endemic equilibria of the model. These bifurcations correspond to the existence of periodic solutions that oscillate around the equilibria at given thresholds. Further, we show how the delay can result in more HIV infections causing more increase in the HIV prevalence. Part of this study is then extended to study a co-infection model of HIV-TB. A thorough bifurcation analysis is carried out for this model. Robust numerical methods are then designed and analyzed for these models. Comparative numerical results are also provided for each model. / South Africa

This study emanates from the need to understand the socio-economic factors that might have contributed to the patients dropping out of the MASA antiretroviral therapy programme in Botswana. The aim of the study was to explore the socio-economic factors that are involved in compliance to antiretroviral therapy. It is crucial to know what these factors are and the strategies that can be deployed to address them. This will assist in the achievement of the programme goals. The type of research that was used is applied research. One of the primary rationales of applied research is that the study may have some practical use. The purpose of applied research is to contribute knowledge that will help people understand the nature of the problem in order to intervene, and this was the main motivation for this study. Since the MASA programme was launched, there were some patients who were ‘lost to follow-up’. As a result, there was a need to understand the reasons behind this phenomenon, so that the patients who are enrolled on the programme are retained. In order to gain an in-depth understanding of how the socio-economic factors affect compliance with antiretroviral therapy, phenomenology was used as a research strategy. Using the phenomenological strategy helps in understanding the nature or meaning of the respondents’ everyday experiences and to transform experiences into consciousness. The sampling method that was used is probability sampling, utilising availability sampling. The population for this study was HIV positive adults who had dropped out of the MASA Programme at Princess Marina Hospital, IDCC clinic in Botswana. The data collection instrument that was used was the interview schedule. From the conclusions, it is apparent that the socio-economic factors are crucial and should therefore be given more attention if better compliance is to be realised. In the same breath, patients require counselling that will focus, not only on the medical aspects of HIV/AIDS but also on the socio-economic factors. As shown in this study it is predominantly the socio-economic factors that led to patients dropping out of the programme. Social workers can play a critical role in this regard as they are equipped with counselling skills. Lastly, the conclusions and recommendation arising from this study are provided. / Dissertation (MA (Social Health Care))--University of Pretoria, 2007. / Social Work and Criminology / unrestricted

This study presents a qualitative analysis of the dichotomy between official HIV and AIDS policy and its implementation in a Human Rights based, United Nations (UN) agency, located in South Africa. The study demonstrates that although HIV and AIDS policy is an intrinsic part of the commitment of this large organisation, the implementation of the policy, in the form of a Workplace Wellness Programme supported by budgetary resources, is weak and incomplete. The thesis integrates detailed vignettes in drawing attention to how personnel in the South Africa office perceive and experience the implementation of HIV and AIDS policy. Additionally, the voices of bureaucrats are also integrated in an effort to interrogate management attitudes and mindsets on matters of policy and treatment of staff. The study explores staff members’ sense of being stigmatised and discriminated, when living with the virus and their responses to it. In this, I bring a personal perspective to the study, by relating my own views of living with a potentially life-threatening disease to the views of the participants in the workplace in which the study is conducted. Classical Weberian and contemporary accounts of ‘bureaucracy’ and the organisational ‘rule book‘ are drawn upon. It is argued that whilst the value systems and politics of managers in the United Nations system lead them to be defined as progressive, some of the practices within their own institutions are contradictory, indifferent and manipulative leading to the perpetuation of discrimination and anxiety amongst HIV-positive staff. Thus, human agency and ingenuity supersedes organisational structure and the rigour of organisational policies and rules. The contradictions highlighted necessitate a careful scrutiny of organisational dynamics, within the wider international development scenario, and organisational introspection within individual UN offices vis-à-vis HIV and AIDS policy implementation. It is envisaged that the study will induce the commissioning of a larger study carried out by an independent body and funded by the United Nations, enabling the validation and enhancement of the argument presented in the case study and provide more recommendations for the way forward for the United Nations. / Thesis (DPhil)--University of Pretoria, 2010. / Sociology / unrestricted

Introduction An estimated 11.4% of South Africans are infected with HIV. As of 2007, 1.7 million people required antiretroviral therapy (ART) and only 460 000 were reported to be on ART. ART can improve the quality of life and socio-economic status for HIV positive patients. This study aimed at evaluating the role played by the different factors in influencing treatment adherence among HIV patients on ART. Methods The study was conducted on patients receiving out-patient ART in two district hospitals (one urban and the other rural) of Mpumalanga Province, South Africa. The study project was approved by the Research and Ethics Committee of the University of Pretoria as well as by the Mpumalanga Provincial Department of Health. This was an analytical, cross-sectional study. The sample size for the study was 490 (245 per site). Facility-based patient appointment registers for the period June-August 2008 were used as the sampling frame. The respondents were selected through systematic random sampling. An interviewer directed standardised questionnaire was administered to the respondents after securing voluntary informed consent. Data were also extracted from the attendance registers in the two facilities. Adherence was measured using the Patient Medication Treatment Adherence Questionnaire. The Pearson chi-square test of association and binary logistic regression analysis were used for identifying significant predictors of non-adherence variables. Results Four hundred and twenty nine questionnaires of the 488 returned questionnaires were analysed. Sixty one questionnaires were disqualified due to incompleteness of data. The response rate was 99.7% in both study areas and participants reported adherence was 92.54%. The median age of the respondents was 36 (IQR, 13), gender distribution was 21.13% males and 78.87% females. The median duration of treatment (in months) with ART was 15 months (IQR, 18). Treatment adherence was higher in the urban than in the rural hospital. The variables that were significantly associated with non-adherence were ‘urban residence’ (OR 0.39 [0.2-0.8]); ‘lack of social support’ (OR 2.74 [1.3-5.7]); Discussion There were also some qualitative variables that had a bearing on quality of healthcare services that could explain differences between the rural and urban sites. Social support and urban residence demonstrated association with treatment adherence. Copyright / Dissertation (MMed)--University of Pretoria, 2010. / School of Health Systems and Public Health (SHSPH) / Unrestricted

Magister Scientiae Dentium - MSc(Dent) / The Human Immunodeficient Virus (HIV) is escalating in South Africa at an alarming rate. The impact of HIV today and in the future could have grave consequences for the South African population as it affects adults in their most productive years. To ease costs on the health system, health workers should be familiar with HIV patients needs in general, and specifically in areas such as oral disease which can contribute to the wellness or ill health of the patient. This could facilitate more appropriate and cost effective care ofHIV patients. World-wide reports indicate that the HIV virus is more prevalent in females than males. Women are also experiencing greater virulence of HIV and therefore greater severity of the disease. This research assessed whether there were differences in the prevalence and severity of oral symptoms ofHIV positive men and women. Oral health practices were also examined. As oral disease is very prevalent in HIV positive persons and has been a neglected area for research and program development, it was included in this study. This study also aimed to assess the perceived needs of patients affected by HIV. Such a study presents HIV positive patients an opportunity to participate in a process which allows patients to voice their needs and problems, as well as be involved in setting priorities. The study sought to assess whether needs differed according to the patients gender, age and symptom levels. A needs questionnaire with five domains which included medical and oral needs, social, economic, psychological and informational domains of needs was developed. The measure also included a section on demographics and oral health questions, and was administered as a structured interview. The sample consisted of 338 HIV positive males and females residing in Cape Town and its environs and attending the Out Patients' Departments of three major provincial hospitals, as well as two community clinics during May to November of 1995.

The HIV and AIDS pandemic is arguably the greatest threat facing the world today. The pandemic has a far-reaching impact on society, including the workplace. The effect in the workplace is observed in various areas including a reduction in certain skills levels, mortality and declining job performance of employees living with HIV or AIDS. In addition, the fear of discrimination and stigmatisation prevents infected employees from disclosing their HIV status, thus driving the pandemic underground. Despite the potential negative impact that is looming, many employers still do not have any workplace support programmes in place to manage HIV and AIDS in their organisations. However, some employers have implemented workplace support programmes. This research thus explored the influence of workplace support programmes on the job performance of employees that were living with HIV or AIDS. The findings suggest that job performance is positively influenced where workplace support programmes have been implemented. / Industrial and Organisational Psychology / M.Comm. (Industrial and Organisational Psychology)

<p>The devastation caused by the Human Immunodeficiency Virus/ Acquired Immune Deficiency Syndrome (HIV/AIDS) is having a major impact on both the social and economic environment in South Africa. HIV/AIDS hits at the core of the businesses structure - the bottom line. In the absence of a cure for the disease or an effective vaccine, the challenge for all the stakeholders is how to successfully contain and limit the impact of the disease. Intervention programmes such as awareness, knowledge sharing and sero-prevailance testing have the potential to limit HIV/AIDS infections and reduce high-risk behaviours. Whilst education and awareness programmes have been relatively successful in highlighting the dangers of HIV infection, perception, attitudes and behaviours of employees towards HIV/AIDS have dampened voluntary HIV screening initiatives. Many South African organisations have commendable HIV/AIDS education and awareness programmes, however, a concerning fact is that employees are reluctant to avail themselves to voluntary HIV/AIDS testing. Stigmatising attitudes toward persons living with HIV/AIDS may reduce people&rsquo / s willingness to have themselves tested for the Human Immunodeficiency Virus (HIV). This may increase the risk of transmission. It may also lead to increased absenteeism in the workplace, and workdays lost resulting from excessive sick.<br /> <br /> The aim of the study was to establish what the perceptions and attitudes are of employees at different levels of the organisation with regard to HIV/AIDS testing. A further aim was to identify possible reasons for the poor employee response to voluntary HIV/AIDS testing. It was thus important for this research to gauge employee knowledge, attitude and behaviour toward HIV/AIDS in order for organisations to develop strategies for effective HIV/AIDS counselling and testing programmes.<br /> <br /> The data for this study was collected by means of a self report questionnaire. The questionnaire was administered to a sample of employees across all levels of the organisation using the convenient sample approach to identify the respondents. Two hundred and forty six (246) out of a total of 600 questionnaires distributed were returned, making the response rate a credible 41%.<br /> The Statistical Package for Social Science (SPSS) was used to analyse the data obtained from the questionnaire. Both inferential and descriptive statistical approaches were used to analyse the data. The Analyses Of Variance (ANOVA) was used to determine whether differences exist in the perceptions and attitudes of employees at different levels and groupings in the organisation. Additionally post hoc tests (i.e. the Scheffe test) were applied to all comparisons of means after the analysis of variance.<br /> <br /> The findings of this research are important for the role of HIV/AIDS testing and awareness/preventions strategies implemented in South Africa. It provides more insight as to why employees resist HIV/AIDS testing. It can furthermore assist organisations in developing strategies for implementing effective HIV/AIDS awareness and/or prevention programmes. More specifically, the findings identified ways in which organisations can redesign their intervention programmes so as to encourage a greater number of employees to submit to voluntary HIV/AIDS testing.</p>

BACKGROUND: The needle exchange programme (NEP) started in Sweden in 1986 in Lund and shortly after in Malmo. The first NEP in Stockholm opened in spring 2013. The NEP is a service aimed at intravenous drug users (IDU) from 18 years old, with a goal of preventing the blood borne diseases, such as HIV, Hepatitis B (HBV), and Hepatitis C (HCV). With the on going HIV and Hepatitis epidemics, numerous countries around the world have adopted control strategies, such as the NEP to halt the spread of HIV, HBV, and HCV. The objective of this study was to examine if the needle exchange programme has decreased the incidence of HIV, HBV, and HCV in Sweden over a six-year period.  METHODS: Data for incidence and prevalence was extracted from the yearly reports of the Stockholm’s needle exchange programme from 2013 to 2018 and the yearly reports of the public health agency in Sweden from 2013 to 2018. The data was collected for Stockholm, and compared to Västra Götaland, and the whole of Sweden. RESULTS: The incidence of HIV was zero in 2013 and 2015 in the NEP. The incidence of HBV decreased to zero in 2013 in the NEP. There is an increased incidence of HCV in the NEP. CONCLUSION: The NEP has a protective effect through its combination of needle exchange, opiate substitute therapy, counselling, and vaccinations in reducing and stabilising incidences of the infections, in some instances to zero, as well as providing surveillance and treating infections.

O Epstein-Barr Vírus (EBV) é um vírus da família Herpes (HHV-4), presente em grande parte da população mundial. É o agente etiológico da mononucleose infecciosa e da leucoplasia pilosa. A leucoplasia pilosa é uma doença epitelial benigna associada ao EBV, caracterizada pela reprodução replicativa do EBV nas células do epitélio oral, e é uma das mais freqüentes lesões oportunistas em pacientes HIV positivos, sendo menos freqüente apenas que a candidíase, com uma prevalência média entre 10 % e 30%. Por ser uma lesão oportunista bucal fortemente relacionada com a infecção pelo HIV e com a imunossupressão, seu diagnóstico é importante, pois pode sugerir o diagnóstico da infecção em pacientes de sorologia desconhecida para o HIV, e auxiliar no estadiamento da doença. Sua detecção e correto diagnóstico são de particular importância por essa condição estar relacionada à capacidade imune do paciente. Além disso, em pacientes já diagnosticados, ela é indicadora da progressão da doença e da eficácia da terapia antirretroviral. O objetivo desse estudo foi avaliar a presença e a quantidade do EBV na saliva e no sangue de pacientes infectados pelo HIV atendidos no CAPE-FOUSP, verificar a presença clínica de leucoplasia pilosa, estabelecendo a possibilidade da existência de vínculo entre a carga viral do EBV, a manifestação clínica da lesão e a carga viral do HIV. Também se buscou estabelecer relação entre o tipo de terapia antirretroviral em uso e a presença de leucoplasia pilosa, bem como estabelecer relação entre a carga viral do EBV na saliva e no sangue. Foram analisadas 20 lesões de leucoplasia pilosa, num total de 94 pacientes avaliados. Foi encontrada uma correlação positiva entre a Carga Viral do EBV no sangue e na saliva (p=0,001). Quanto maior a carga viral no sangue, maior a carga viral na saliva. Foi encontrada associação entre a Carga Viral do EBV na saliva e a presença de Leucoplasia Pilosa (p=0,045). Indivíduos com Leucoplasia Pilosa apresentam maior Carga Viral de EBV na saliva do que indivíduos sem essa lesão. Foi encontrada uma correlação positiva entre a Carga Viral do HIV e a Carga Viral do EBV na saliva (p=0,006) porém não no sangue. Quanto maior a carga viral de HIV, maior a carga viral do EBV na saliva. Foi encontrada correlação positiva entre a Carga Viral do EBV no sangue e as contagens de CD4 mais baixa registrada e a mais atual (p=0,028 e p=0,030 respectivamente). Quanto maior Carga Viral do EBV no sangue, maior a contagem de CD4. Não foi encontrada associação entre o tipo de medicação antirretroviral em uso e presença de lesão de leucoplasia pilosa. / The Epstein-Barr Virus (EBV) is a herpes virus family (HHV-4), is present in great part of the world population. It is the causative agent of infectious mononucleosis and oral hairy leukoplakia. Oral hairy leukoplakia is a benign epithelial disease associated with EBV, which is characterized by the replicative reproduction of EBV in oral epithelial cells, and is one of the most frequent opportunistic lesions in HIV positive patients, only less frequent than candidiasis, with an average prevalence between 10% and 30%. Being an opportunistic oral lesion strongly associated with HIV infection and immunosuppression, its diagnosis is important, because it may suggests the diagnosis of infection in patients of unknown HIV serology, and assist in the staging of the disease. Its detection and correct diagnosis are particularly important because this condition is related to the patient\'s immune capacity. Moreover, in patients already diagnosed, it is indicative of disease progression and effectiveness of antiretroviral therapy. The aim of this study was to evaluate the presence and quantity of EBV in saliva and blood of HIV-infected patients treated at the CAPE-FOUSP, verifying the presence of clinical OHL, establishing the possibility of the existence of a link between viral load and EBV, clinical manifestation of the lesion, and HIV viral load. It was also aimed to establish the relationship between the type of antiretroviral therapy in use and the presence of oral hairy leukoplakia, as well as establish the relationship between viral load of EBV in saliva and blood. We analyzed 20 lesions of oral hairy leukoplakia, a total of 94 patients. Found a positive correlation between viral load of EBV in blood and saliva (p = 0.001). The higher the viral load in blood, the higher the viral load in saliva. Association was found between viral load of EBV in saliva and the presence of oral hairy leukoplakia (p = 0.045).Individuals with oral hairy leukoplakia have a higher viral load of EBV in saliva than those without such injury. Found a positive correlation between viral load and HIV viral load of EBV in saliva (p = 0.006) but not in blood. The higher the viral load of HIV, the higher the viral load of EBV in saliva. A positive correlation was found between viral load of EBV in blood and CD4 counts the lowest recorded and most current (p = 0.028 and p = 0.030 respectively). The higher viral load of EBV in blood, increased CD4 count. No association was found between the type of antiretroviral medications in use and presence of oral hairy leukoplakia lesions.

Magister Public Health - MPH (Public Health) / The presence of highly effective medicines has made very little impact in reducing deaths as a result of tuberculosis (TB), a curable condition but when managed inappropriately, may result in Drug Resistant TB. TB accounts for about one in four deaths that occur in HIV positive people and HIV has been found to be a risk factor for complex unfavorable outcomes in MDR TB patients and a very strong predictor for death and default. The relationship between diabetes and TB has also been explored, with some authors identifying diabetes as a risk factor for TB, and with related poor clinical outcomes in both conditions when they co-exist. Exploring the clinical characteristics and treatment outcomes of MDR TB patients in the presence of these risk factors could present an opportunity to provide better care through increased case-detection activities, improved clinical management and better access to care for all these conditions. The aim of the study was to describe the clinical characteristics and treatment outcomes of MDR TB patients initiated on treatment at Nkqubela and Fort Grey Hospitals.