Collecting blood from repeat blood donors is cost effective and safer compared to other donor types. At the end of 2012, 84% of the SANBS donor panel were inactive or lapsed. There is a lack of research available on lapsed donors in the South African context and available research is mostly quantitative with subtle contradictions. Donors who donated blood in 2012 at fixed site donor centres in Port Elizabeth, and did not return in 2013, were studied. A descriptive analysis was done and a random sample of 78 lapsed donors were selected to participate in a face-to-face interview. Interviews were digitally recorded and transcribed. A grounded model was developed from various existing theories to seek out and conceptualise social patterns and structures of lapsed blood donors through a process of comparison. There were 10 062 donors who donated blood in 2012 and 4 923 became lapsed during 2013. Analysis of sub groups showed a higher proportion of donors who became lapsed in the following sub-categories: new donors (95%), re-joined donors (64%), black donors (63%), donors younger than 40 (61%), female donors (52%). The feedback received from the 11 participants highlighted peer pressure as the biggest motivator. Of the six communication theories applied, The Social Penetration Theory highlighted the cost-minus-benefit ratio which played a big role in a donor’s motivation and decision to return. The AIDA Marketing Model application described lapsed donor behaviour most comprehensively and it highlighted a missing step which was created as part of a Grounded Model and is called the AIDAA Model. The role and existence of peer pressure is directly linked to donor motivation and is categorised as an Action Motivator in the AIDAA Model. The new model creates additional recruitment opportunities which has not been explored and applied strategically before.

No description available.

Philosophiae Doctor - PhD / This thesis consists of a brief description on cancer, carcinogenesis, the changes in the type and level of dietary fat available in our diets over time and association with the development of certain diseases. The main focus of this research was on omega 6 and omega 3 essential fatty acids (EFA) and their interaction with regards to carcinogenesis. / South Africa

Magister Public Health - MPH / Regular physical activity is linked to enhanced health and to reduced risk for mortality and the development of many chronic diseases in adults. However, many adults are either sedentary of less physically active. Children and adolescents are more physically active than adults, but participation in physical activity declines with age during adolescence. Girls are less active than boys, older children and adolescents are less active than younger children, and among girls, blacks are less active than whites. This study aimed to examine physical activity in female learners attending Kagiso Township high schools in Gauteng Province. / South Africa

The health of pregnant women is a major concern to health care providers. This grounded theory study of 40 women examined the health of pregnant women and the special threat that poverty and violence posed to their capacity for health. Pregnant women experienced their health as an integrated part of their daily lives; that is, they reported that their health was affected by 'everybody and everything." Women's main concern during pregnancy was to have a healthy newborn and, to this end, they engaged in the process of creating a healthy pregnancy by engaging in health-enhancing behaviours. In this process, the woman focused primarily on ensuring the birth of a healthy baby. Three conditions were essential to a woman's capacity to create a healthy pregnancy: (1) the acceptance of the pregnancy, (2) adequate financial resources, and (3) supportive relationships (especially having a supportive partner). Pregnancies invariably carried with them some uncertainty, and this caused the 40 women in this study to experience a state of vulnerability which, in turn, triggered attempts to create healthy pregnancies. This led to a cycle of improving health: the more energy women had to carry out health-enhancing behaviours the better they felt physically and mentally; the more able they were to conduct their daily activities; and, consequently, the better their health. However, living within a context of poverty and/or violence increased pregnant women's vulnerability and decreased their capacity for creating a healthy pregnancy, leading to extreme stress and the experience of threat. Male violence threatened the women's ability to be connected to those who were important sources of emotional, financial, task-oriented, and knowledge-oriented support, and, thus jeopardized their ability to meet their fundamental needs. Furthermore, the lack of sufficient financial resources limited women's abilities to leave their abusive partners. In order to survive, women in these circumstances sometimes reverted to previous, often harmful, ways of coping in an attempt to reduce their high levels of stress. These coping strategies usually took the form of behaviours that required little energy, such as smoking, not eating properly, and consuming alcohol. Having financial support and a safe place to go were crucial with regard to enabling women to decide to leave abusive partners. Regaining control of their lives in this way allowed women to refocus their energy on health-enhancing behaviours. The women in this study showed incredible strength as they met the challenges imposed by poverty and abuse. They did not remain victims but took hold of their lives with courage and conviction. In order to promote the adoption of health-enhancing behaviours by childbearing women, health care providers must recognize poverty and violence as factors that significantly threaten women's capacity for health. Further to this, special efforts must be made to render culturally sensitive care to First Nations women (i.e., recognizing their cultural identity and heritage, their connection to nature, and the importance of the elders of their community). To this end, we must recognize the connections between racism, colonization, poverty, and violence. For until we have eradicated poverty, and the cycle of violence and degradation that is its legacy, we will not have succeeded in doing all we can to ensure the health and well being of our citizens. / Applied Science, Faculty of / Nursing, School of / Graduate

Philosophiae Doctor - PhD / For many decades, the World Health Organisation had highlighted the growing importance of chronic non-communicable diseases in developed and developing countries, with an increase in lifestyle-related diseases. Physical inactivity has been identified as one of the risk factors, in addition to other leading risk factors like diet, and the use of tobacco and alcohol, contributing to the occurrence of non-communicable diseases like cardiovascular diseases, cancers, obesity and type 2 diabetes mellitus. Based on the researcher's observations while living in Belhar community for more then ten years, it was hypothesized that the level of physical inactivity among adolescents could become a public health problem in the future if not addressed immediately. / South Africa

Magister Scientiae (Physiotherapy) - MSc(Physio) / Associated with physical inactivity and obesity are numerous other health risks which have become a major health concern. A steady decrease in the levels of physical activity during childhood and adolescents have been noted in various parts of the world. The picture of low physical activity levels in developed countries is no different in developing countries. Children spend the majority of their day at school therefore a school setting is ideal to conduct physical activity intervention studies The primary aim of this study was to measure the effect of an intervention programme on the physical activity participation levels among school going children and adolescents. The study was carried out at an urban independent Catholic school. The sample, which was conveniently selected, which included 100 learners from grade 5 to 7 with parental consent. A quantitative approach using a quasi-experimental design was used in this study. Baseline data included levels of physical activity participation, Body Mass Index (BMI), hip-waist ratio, and socio-demographic variables. Physical activity was assessed with the Modifiable Activity Questionnaire for Adolescents. The Promoting Lifestyle activity for Youth (PLAY) programme was implemented at the school. This process-oriented programme shifts the focus from fitness toward regular participation in daily physical activity, and it is not intended to replace a comprehensive physical education programme. / South Africa

Salmonella sp. é um dos principais microrganismos causadores de surtos de enfermidades transmitidas por alimentos associados ao consumo de ovos e de alimentos formulados com este ingrediente. Ovos desidratados são largamente utilizados pelas indústrias de alimentos, por oferecer maior praticidade e maior padronização em relação ao produto \"in natura\". Apesar do processo tecnológico de desidratação do ovo incluir uma etapa de pasteurização, existe um risco de haver microrganismos sobreviventes, já que a pasteurização é feita em temperatura branda. Além disso, a pasteurização pode destruir os fatores intrínsecos antimicrobianos presentes na clara, possibilitando a multiplicação de microrganismos que sobreviveram ao processo de pasteurização ou que contaminaram o produto após a pasteurização. O controle da Aa do produto desidratado e o tempo de armazenamento são, portanto, fatores fundamentais para o controle da multiplicação de microrganismos indesejáveis. Nesse estudo, avaliou-se a cinética de multiplicação de Salmonella experimentalmente adicionada a ovo em pó Aa ajustada para 0,4, 0,6, 0,8 e 0,9, durante o armazenamento em quatro temperaturas: 8°C, 15°C, 25°C e 35°C. Os resultados indicaram que S. Enteritidis é capaz de sobreviver por longo tempo (pelo menos 56 dias) em ovo em pó com Aa próximo de 0,4 quando armazenado a 8°C, 15° e a 25°C. Essa sobrevivência é menor (até 28 dias) quando o armazenamento é feito a 35°C. No ovo em pó com Aa em tomo de 0,6 ou 0,8, S. Enteritidis sobrevive por menos tempo do que no produto com Aa de cerca de 0,4, independentemente da temperatura de armazenamento. No produto com Aa de cerca de 0,9, há grande multiplicação de S. Enteritidis quando o armazenamento é feito a 15°C, 25°C ou 35°C. Nesse produto, o armazenamento a 8°C impede a multiplicação do patógeno. Verificou-se também que Salmonella Radar, resistente a diversos antibióticos, apresentou o mesmo comportamento que S. Enteritidis nas amostras de ovo estudadas. / Salmonella is one of the major foodborne pathogens associated to the consumption of eggs and foods containing eggs. Powdered eggs are widely used in the food industry because they are more convenient and uniform than the in natura product. Despite the existence of a pasteurization step in the drying process, Salmonella can survive because the pasteurization of eggs should be done under mild temperature. Moreover, pasteurization can destroy the intrinsic antimicrobial components of the albumen, making the multiplication of Salmonella possible when the time and temperature of storage are not appropriate. Thus, the water activity (Aw) of the product and the storage time and temperature are essential factors in the control of Salmonella. In this work, we evaluated the growth kinetics of Salmonella in experimentally inoculated powdered egg, adjusted to different Aw values (0.4, 0.6, O.S and 0.9) during storage at 8°C, 15°C, 25°C and 35°C, up to 8 weeks. The results indicated that Salmonella Enteritidis is able to survive for long time in powdered eggs (at least 56 days) when the Aw is dose to 0.4 and the temperature is 8°C, or 15°C or 25°C. The survival is lower when the temperature is 35°C. When the Aw is dose to 0.6 or to 0.8, the pathogen survives for less time than in the product with Aw 0.4, regardless the storage temperature. When the Aw is dose to 0.9, there is an intensive growth of the pathogen when the storage is done at 15°C, 25°C or 35°C. However, storage at 8°C inhibits the growth of Salmonella at this Aw. Salmonella Radar, resistant to several antibiotics, presented the same growth partem as S. Enteritidis.

Existent literature suggests forgiveness could lead to either greater psychological abuse (reinforcement theory), or lower psychological abuse (interpersonal theory). Questionnaires were completed by 291 participants who were dating at least 2 months. More forgiveness-particularly Absence of Negativity-was related to less abuse received from their partner, and this effect was stronger for females than for males. Absence of Negativity (AN) was predictive of health variables (psychosomatic symptoms, mental and physical health), although Presence of Positive forgiveness did not predict health beyond the impact of AN. Abuse-forgiveness and assertiveness-forgiveness interaction terms were not significant predictors of health. Results indicate interpersonal theory describes the link between forgiveness and psychological abuse. Results suggest that focus on AN could be sufficient for mental or physical health change

Medical male circumcision prevalence in Lesotho remains at 23% even though efforts are made to encourage men to be circumcised. The purpose of this study was to explore and describe perceptions of men regarding male circumcision in a hospital in Morija, Lesotho and make recommendations on how to promote uptake of medical male circumcision. A descriptive, explorative and contextual qualitative design was used. In-depth, unstructured individual interviews were conducted on ten (10) uncircumcised men who were selected via purposive sampling. The findings revealed that men’s perceptions on circumcision can be classified under the following themes: perceived health beliefs of men about circumcision, perceived community-held beliefs about circumcision, men’s knowledge regarding circumcision, and perceived misconceptions about circumcision. It is recommended that knowledge on circumcision be reinforced and negative perceptions be corrected with the multi-sectoral approach to promote uptake of circumcision services. / Health Studies / M.A. (Public health)