Rural agriculture in Mlondozi, as for South Africa, is has a low productivity, which is the result of poor knowledge, information, beliefs and land tenure which limits the acquiring of loans for inputs. A LandCare Project was conducted for four years. Training was in the form of farmer managed research demonstrations which included the taught Conservation agriculture farming system which they compared to the Traditional farming system. Eighteen farmers initially joined the program and their soils were monitored for four years. At the end of the project undisturbed soil samples were taken from their fields where maize was cultivated following no-till (NT) farming system, and the conventional tillage system (CT). The soils from the two farming systems were compared using a laboratory rainfall simulator for run-off, erosion and infiltration. Each storm event in the rainfall simulator lasted for a period of 110 minutes (50 rotations). There were two statistical analyses done on the results. The first was a t-test was applied to the data to test for differences between the two systems, with a sample size of 72, at 18 sights with 4 replicates, except for carbon which was 36 analyses for the 18 sights. There was a significantly higher soil loss for NT soils for storm 1, compared to the CT soil, and a non significant difference for run-off for storms 1 and 2. Infiltration was significantly lower for the NT soil for the first storm, and not significantly higher for the NT soil for the second storm. The CT soils had a significantly higher infiltration rate for the first 16 rotations. After 68 minutes (rotation 34) the NT soils infiltration rate was higher. For simulated storm 2 the CT soils had a slightly higher infiltration rate up to 32 minutes (16 rotations) where after NT soils had a higher infiltration rate. Between 48 and 80 minutes (rotations 24 and 40) the NT soils had a significantly higher infiltration rate. From the results it can be concluded that the NT soils maintained the aggregate stability far longer than the CT soils. The initial and final infiltration rates were compared for the NT and CT soils for the simulated storms 1 and 2. The CT soils’ initial and final infiltration rate was similar, while the NT soils had a higher initial and final infiltration rate for the second storm, due to the soils settling with the first storm. The results question current literature that states that sealing of soils is a permanent feature. The carbon content of the NT soils was not significantly higher than the CT soils, which corresponded with the results. / Dissertation MInst (Agrar)--University of Pretoria, 2014 / gm2015 / Plant Production and Soil Science / MInst (Agrar) / Unrestricted

The WHO member countries undertook to eliminate poliomyelitis globally by the year 2000. Acute flaccid paralysis (AFP) surveillance finds paralytic cases of polio so that swift action can be taken and shows that wild poliovirus has been eliminated when polio cases no longer occur. Mpumalanga Province, a rural province in the north-east of South Africa, developed a rapid reporting system where infection control nurses at the public and private sector hospitals report weekly to the AFP surveillance Officer, including zero reporting, on 9 infectious disease syndromes that require rapid action on clinical presentation alone. This system was implemented in 1998 and included AFP. The non-polio AFP reporting rate increased from 0.37 in 1997 to 0.55 during 1998 with more than 80% of the units reporting weekly. The binomial exact confidence intervals however include 1. A hospital record review of all paediatric admissions revealed that only 2 AFP cases were missed by the system. The AFP reporting rate remains below the international standard of 1 per 100 000 children under 15 years of age despite an adequate reporting system. The role of chance variation, particularly in small geographical areas, has not been discussed in official polio-eradication guidelines but it is . imperative that population size be taken into account when judging the rate of AFP case detection. With the low international reference rate and play of chance variation it is possible that regions with relatively small populations, low non-polio AFP detection rates and no cases of polio detected for an extended period may have adequate surveillance systems supporting polio free certification. In these areas additional criteria for determining the adequacy of the surveillance system should also be considered. / Dissertation (MMed)--University of Pretoria, 2006. / School of Health Systems and Public Health (SHSPH) / Unrestricted

The outlook for Nile crocodiles in the Olifants River does not look optimistic. Since the increase in capacity of the Loskop and Flag Boshielo Dams, the crocodile population was left with no basking or nesting sites and has declined over the past 30 years. Shortly after the Massingire Dam in Moçambique filled to full capacity an estimated 160 crocodiles died in the Olifants River Gorge, a couple of kilometres upstream from the dam. The Olifants River is acknowledged by many experts as one of the most polluted rivers in South Africa and acid mine drainage, industrial pollution and untreated sewage in the river are all contributing to the poor water quality of the river. Further, the Department of Water Affairs and Forestry acknowledge that water demand already exceeds their capacity to supply and that the situation will worsen considerably in the near future. Aerial surveys of Nile crocodiles in the Olifants River was carried out during December 2005 and November 2009. An average total population of 714 Nile crocodiles were counted and corrected to an estimated 1140 individual crocodiles to eliminate the effects of undercounting. The Kruger National Park and specifically the area of the Olifants River Gorge was found to be one of the preferred habitat areas for crocodiles in the Olifants River as was the Flag Boshielo Dam, the area between the Blyde River and the western boundary of the Kruger National Park and the Olifants River between the Loskop Dam and the Flag Boshielo Dam. Repeated nesting in areas such as the Kruger National Park, the Flag Boshielo Dam and the Olifants River between the Loskop Dam and the Flag Boshielo Dam confirmed that these areas are critically important to the nesting success of Nile crocodiles in the Olifants River. The Elands River was confirmed as an important refuge area for Nile crocodiles in the Groblersdal-Flag Boshielo Dam area of the Olifants River. Surveys revealed an estimated total of only 15 crocodiles in the Loskop Dam and confirmed that no crocodiles in the large (2.1 - 4.0m TL) and very large size class (>4.0m TL) are currently present in the population. Blood biochemistry results indicate that the Olifants River Nile crocodile population probably suffers from chronic inflammation (especially in the Loskop Dam and Olifants River Gorge populations), infectious disease (particularly in the Loskop Dam population but all other sites also showed elevated values), possible inadequate diet and malnutrition (especially during the pansteatitis outbreak of August/September 2008) and are suffering serious immune problems in the Olifants River Gorge. A conservation and management plan is suggested which identifies threats to the continued existence of a viable Nile crocodile population in the Olifants River. Finally, it is suggested that the conservation status and risk of extinction of Nile crocodiles in the Olifants River be upgraded to the Endangered category since it currently complies to the following criteria; EN A2abce; C2a(i) published in the IUCN Red List Categories and Criteria Version 3.1 (IUCN, 2001). / Thesis (PhD)--University of Pretoria, 2011. / Centre for Wildlife Management / 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

Please read the abstract in the section 00front of this document / Dissertation (MA (Development Communication))--University of Pretoria, 2006. / Information Science / unrestricted