With 10% of the population being infected with Human Immunodeficiency Virus (HIV), South Africa has the highest number of infections in the world (StatsSA, 2013). HIV results in cognitive and motor deficits in children as the severe compromise of the immune system leads to neurodevelopmental dysfunction peri-natally (Ruel, Boivin, Boal, Bangirana, Charlebois, & Havlir, 2011). Neurocognitive deficits affect overall general intellectual abilities and include difficulties with attention and speed of information processing, verbal language, executive –abstraction, complex-perceptual motor function, memory and motor and sensory function (Dawes & Grant, 2007). Developmentally, it is evident that working memory provides a crucial interface between perception, attention, memory and action (Baddeley, 1996; Baddeley 2003). Therefore the purpose of the study was to investigate the working memory profiles of both an HIV positive children and a control sample, on cognitive tasks (Automated Working Memory Assessment), general intellect tasks (Raven’s Colored Progressive Matrices) and language competence tasks (Sentence Repetition Test). The current study compared 26 HIV positive children (mean age = 6.58 years) to 26 matched controls (mean age = 6.73 years). It was found that both non-verbal IQ and language proficiency were correlated to HIV status and thus were used as covariates in the study. MANCOVA’s were conducted on the data and produced findings that showed that there were only significant differences in visuo-spatial short-term memory between the two groups. Furthermore, it was also found that there were significant differences between the groups on nonverbal IQ and language proficiency. Therefore, the results showed that HIV may have an overall effect on non-verbal ability and language proficiency and a few aspects of working memory such as visuo-spatial short-term memory. Together with future studies focused on larger sample sizes and children who are not currently on HAART, early developmental interventions can be formulated to assist South African HIV-infected children so that the neurocognitive effects are lessened and their overall lifestyle is improved.

First eleven leaves not numbered / The purpose of this study was to identify, explore and describe the potential contributing factors of the upsurge of HIV among children aged three to eighteen months in the Mangaung Metropolitan area of the Free State Province in South Africa. The study was conducted at five primary healthcare facilities and one hospital in the Mangaung metropolitan municipality of the Free State Province with sixty randomly selected mothers of children testing HIV-positive for the first time between the ages of three and eighteen months. The convergent mixed-methods research design was opted for, according to which both qualitative and quantitative data were collected at the same health facilities selected by means of cluster sampling. The review of medical records, unstructured interviews, and structured questionnaires were used for qualitative and quantitative data collection, while random cluster sampling was used for participant selection. Thematic data analysis was applied for the interpretation of recurrent patterns of qualitative and quantitative data. The study results revealed that mothers were well-informed about the prevention of mother-to-child-transmission. The main factors that contributed to more children testing HIV positive after the routine tests were conducted at ten weeks included non-adherence factors to PMTCT prescripts mainly by mothers, such as: babies were not brought to the clinics for testing and immunisations at ten weeks, and that mothers acquired HIV infection during the breastfeeding period. Some other potential contributing factors were late antenatal booking which lead to the delay in initiation of antiretroviral treatment, nonadherence to antiretroviral therapy during pregnancy, and mixed feeding. The themes that emerged from the qualitative data were psychological factors, emotional factors, socioeconomic factors, missed opportunities, risky behaviour, as well as women disempowerment; while some mothers were left with unanswered questions. The results of the qualitative part complemented the quantitative findings as they uncovered the factors that led to the deviation from the PMTCT prescripts by the mothers. The study’s recommendations include PMTCT psychological assessment and counselling; partner and community involvement; women empowerment; and that couple testing at antenatal and postnatal clinics should be a national policy subjected to protracted monitoring and evaluation processes. / Health Studies / D. Litt. et Phil. (Health Studies)

This study was conducted to investigate the role of natural killer cell surface receptors, KIRs and their cognate HLA ligands in preventing HIV-1 acquisition and disease progression in HIV-1 exposed infants. Using DBS stored for 8 years from 21 pregnant South African women we evaluated 3 methods of gDNA extraction with and without whole genome amplification (WGA) to characterize immune-related genes: IL-10, KIR and HLA class I. However, IL-10 SNP typing was only for testing the quality of gDNA. QIAamp DNA mini kit yielded the highest gDNA quality (p<0.05; Wilcoxon Signed Rank Test) with sufficient yield for subsequent analyses. In contrast, WGA was not reliable for SSP-PCR analysis of KIR2DL1, KIR2DS1, KIR2DL5, and KIR2DL3 or high resolution HLA genotyping using a sequence-based approach. A cohort of 370 infants; 124 HIV-1 perinatally infected, 120 exposed uninfected and 126 unexposed healthy infants was used for KIR and HLA genotyping. After adjustment for viral load and multiple comparisons, the frequency of HLA-Cw*04:01 allele was likely to be associated with susceptibility to mother-to-child acquisition of HIV-1 in exposed infected (EI) infants (p=0.05; Logistic Regression analysis). HLA-A*23:01 was likely to be associated with decreased CD4 T lymphocyte count in HIV-1 infected infants (p=0.01; ANOVA), whereas HLA-B*81 tended to be associated with higher CD4 T lymphocyte count (p=0.04, ANOVA). We speculate that HLA-Cw*04:01 interacts with KIR2DL1 and inhibit NK cell responses which predispose the infants to HIV-1 infection. KIR2DS1 and KIR2DL5 were both associated with faster HIV-1 disease progression. Identified protective HLA-class I alleles could be used to present viral epitopes to either NK cells via KIRs or CTLs and enhance immune activation which may promote resistance to HIV-1 infection. / Thesis (M.Med.Sc.)-University of KwaZulu-Natal, Durban, 2012.

Human Immunodeficiency Virus is the leading cause of death among women of reproductive age worldwide. It is also a major contributor to infant mortality. The effective application of prevention of mother-to-child transmission strategies effectively reduces the risk of mother-to-child transmission. The intent of this study was to determine the availability and accessibility of the PMTCT programme in one district of the North West Province of South Africa. A qualitative, explorative, descriptive and contextual design was utilised to gain better understanding of the experiences of both the HIV positive pregnant women and the Health Care Workers regarding the availability and access to the PMTCT programme. The study population consisted of HIV positive pregnant women between 18 and 49 years of age and Health Care Workers aged between 21 to 60 years of age. The non-probability purposive sampling technique was utilised to identify potential research participants. Data were collected by means of individual semi-structured interviews with HIV positive pregnant women and focus group discussions with the Health Care Workers. Adherence to Tesch’s eight descriptive methods was utilised as the primary form of data analysis, organisation and interpretation. The findings of the study revealed that availability and accessibility of PMTCT services are still problematic. Distance, waiting periods, and long queues were among the few mentioned as problematic. There were also few positives such as communication, counseling and health education. Strategies for facilitation of the availability and accessibility of the PMTCT programme were developed based on the findings. Themes emerged from the HIV positive pregnant women’s data included: acceptance of one’s sero positive status, maternal concerns, stressors about HIV status, as well as lack and shortage of resources and support by health care professionals and family; while emerging themes from the Health Care Workers included: fear of disclosure by HIV positive pregnant women, child feeding, formal trainings and workshops on PMTCT programme, as well as lack and shortage of resources and loss to follow-up activities / Health Studies / D. Litt. et Phil. (Health Studies)

Human Immunodeficiency Virus is the leading cause of death among women of reproductive age worldwide. It is also a major contributor to infant mortality. The effective application of prevention of mother-to-child transmission strategies effectively reduces the risk of mother-to-child transmission. The intent of this study was to determine the availability and accessibility of the PMTCT programme in one district of the North West Province of South Africa. A qualitative, explorative, descriptive and contextual design was utilised to gain better understanding of the experiences of both the HIV positive pregnant women and the Health Care Workers regarding the availability and access to the PMTCT programme. The study population consisted of HIV positive pregnant women between 18 and 49 years of age and Health Care Workers aged between 21 to 60 years of age. The non-probability purposive sampling technique was utilised to identify potential research participants. Data were collected by means of individual semi-structured interviews with HIV positive pregnant women and focus group discussions with the Health Care Workers. Adherence to Tesch’s eight descriptive methods was utilised as the primary form of data analysis, organisation and interpretation. The findings of the study revealed that availability and accessibility of PMTCT services are still problematic. Distance, waiting periods, and long queues were among the few mentioned as problematic. There were also few positives such as communication, counseling and health education. Strategies for facilitation of the availability and accessibility of the PMTCT programme were developed based on the findings. Themes emerged from the HIV positive pregnant women’s data included: acceptance of one’s sero positive status, maternal concerns, stressors about HIV status, as well as lack and shortage of resources and support by health care professionals and family; while emerging themes from the Health Care Workers included: fear of disclosure by HIV positive pregnant women, child feeding, formal trainings and workshops on PMTCT programme, as well as lack and shortage of resources and loss to follow-up activities / Health Studies / D. Litt. et Phil. (Health Studies)