PhDRDV / Institute for Rural Development / Throughout the world, small-scale food vending forms an integral part of society, serving as a poverty buffer and a local based economy generation strategy to optimize livelihoods. However, untrustworthiness and safety concerns have been raised regarding the food handling practices and hygiene that tend to compromise the quality of the food sold in this sector. Thus, this study was conducted in order to propose the pillars of a safety management system for small-scale vended foods in Thulamela Municipality in South Africa. The pillars were proposed after assessing the level of small-scale food vendors’ knowledge, attitude and handling practices. Complementary, the microbiological quality of the commonly consumed small-scale vended foods was determined. A survey-underpinned exploratory sequentially integrated mixed methods research design was adopted. Fifty-four respondents participated in a qualitative study via administering a semistructured interview guide to key informants and focus groups. Correspondingly, quantitative data were collected through a 5-point Likert questionnaire, administered to 136 small-scale food vendors and 272 customers. An observation checklist was used to collect data on 124 food stalls focusing on food handling practices. Microbial loads were determined through analysing 28 food samples collected from seven informal food markets. Qualitative data were analysed using ATLAS. ti version 8.0. The Statistical Package for Social Sciences version 25.0 was used to analyse quantitative data. Descriptive statistics were used to calculate frequencies and mean scores. The Spearman’s rank correlation coefficient (r) was used to determine the degree of correlation among variables. Principal Component Analysis was used to isolate and deepen understanding of the main factors determining the knowledge and attitude towards food safety. Hierarchical Cluster Analysis was used to identify two cluster solutions for food handling practices. Mann-Whitney U tests were conducted to determine the relative stability of the generated two cluster solutions. Ordinal Least Square regression analysis was conducted to identify the variables which were critical in defining the state of food handling practices dynamics in the study area and their relationship with other variables. Data on the microbial counts were subjected to the Analysis of Variance. Duncan’s multiple range test was used to separate means while T-test was conducted to establish if there was any difference between organisms isolated for each food type from Thohoyandou and Sibasa markets. In general, food vendors were knowledgeable about personal (x̄ = 1.77) and food (x̄ = 1.75) hygiene respectively. However, they rarely considered knowledge of foodborne diseases and rules and regulations as crucial in defining the quality and safety of small-scale vended foods. Respondents reflected positive attitude towards personal hygiene (x̄ = 3.21), food hygiene (x̄ = 3.55) and utensils management (x̄ = 3.43). The highest correlation relations between variables of roadside vendors’ knowledge of food safety were observed to be between “Staphylococcus as a germ that causes foodborne diseases” and “Hepatitis A virus that can cause foodborne disease” (P < 0.01). From thirty-six factors that determined the knowledge and attitude towards food safety, the Principal Component Analysis isolated eight components that accounted for 50 % of the variability. Similarly, customers were knowledgeable about food hygiene (x̄ = 1.88) personal hygiene (x̄ = 1.86). They also showed positive attitude towards personal (x̄ = 3.66) hygiene, food (x̄ = 3.72) hygiene and utensils management (x̄ = 3.56). From thirty-six factors that determined the knowledge and attitude towards food safety, the Principal Component Analysis isolated ten components that accounted for 60. % of the variability. The results revealed the six major determinants of the state of handling practices in Thulamela Municipality. These were stalls conditions, personal hygiene, environmental and waste management, hygiene-related behaviour, food storage and utensils management. The most significant variables defining the state of food handling practices were protective clothing (P < 0.05) and stalls conditions (P < 0.05). The microbial counts (log10 cfu/g) of food samples ranged from 2.0 ± 2.08 to numerous to count for total plate count, 2.0 ± 1.00 to 6.6 ± 7.57 for Salmonella spp, 2.0 ± 2.64 to 3.9 ± 6.03 for S. aureus, 2.1 ± 1.73 to numerous to count for yeast, 2.0 ± 0.00 to 3.8 ± 10.00 for coliform bacteria and 2.0 ± 1.15 to 4.9 ± 21.66 for B. aureus. Coliform bacteria and B. cereus were not found in foods sold at Thohoyandou markets while mould was not detected in foods collected at both locations. Total plate count differed significantly (P < 0.05) between salads and chicken stews. Salmonella spp, significantly differed (P < 0.05) between salads and beef stews. For S. aureus, a significant difference was found in salads (P < 0.05). For yeast, significant differences (P < 0.05) were observed between salads and beef stews. The main objective of this study was to propose the pillars of a safety management for small-scale vended foods. Thus, the major components of pillars proposed were encored on hygiene (personal, food and handling practices), training programme, environmental management, infrastructure development and law enforcement. The training programme was scored as number one by the majority of food vendors (x̄ = 4.7) whilst personal hygiene was ranked first by the customers (x̄ = 4.8). The results of the study revealed the urgent need for basic training in food and personal hygiene throughout the value chain. Infrastructure development such as a decent food stalls with adequate working space, proper washing and storage facilities to improve food safety and hygienic practices was highlighted. Adequate access to waste-water and food disposal facilities aligned to vending spaces was also considered crucial. Thus, it is recommended that Thulamela Municipality should provide extensive training programme to ensure that proper hygiene practices are in place. Suitable regulations must be crafted to ensure that safe and secure foods are sold. Lastly, Thulamela Municipality should consider providing all vending stalls with basic infrastructure to close the gap between knowledge and practices of safe small-scale food vending. / NRF

MPH / Department of Public Health / See the attached abstract below

Beim Parameter „Druscheignung“ eines Bestandes wird gemeinhin angenommen, dass dieses Kriterium durch die Genetik der Sorte und den Witterungsverlauf, weitgehend unbeeinflusst von Landwirt, festgelegt ist. Und dennoch verändert der Landwirt mit all seinen Entscheidungen von der Auswahl der Sorten, über die Düngung, den Pflanzenschutz bis hin zum Erntemanagement die Druscheignung stetig. Zur Ernte, als letzten Abschnitt der Verfahrenskette, entfaltet die Druscheignung dann außerordentlich große ökonomische Auswirkungen. Anhand verschiedener Beispiele aus Züchtung, Pflanzenernährung, Pflanzenschutz und Erntetechnologie wurde dargestellt, wie auf die Druscheignung Einfluss genommen werden kann und wie diese Auswirkungen monetär zu bewerten sind. Aus dem Bereich der Züchtung wurde die Entwicklung eines neuen Wuchstyps bei den Rapshalbzwergen ausgewählt, der mit weniger Biomasse konkurrenzfähige Erträge erzielt. Die Abreife ist einheitlicher, der Erntetermin kann problemloser fixiert werden, der Drusch ist leistungsstark und verlustarm. Späte und intensiv geführte Sorten sind mit Hilfe einer Sikkation zeitlich früher und leichter zu beernten. Das schafft Erntesicherheit bei geringeren Verlusten, höheren Mähdrescherleistungen und sinkendem Kraftstoffverbrauch. Die bedarfsgerechte Ausbringung des Stickstoffs in Art, Menge und Zeit, entsprechend der kleinräumigen Heterogenität eines Schlages, führt zu einer Homogenisierung der Bestände. Die Bestände reifen gleichmäßiger ab und führen zu etwa 20 Prozent höherer Mähdrescherleistung sowie geringerem Kraftstoffverbrauch. Am Beispiel des Hochschnitts wurde verdeutlicht, wie sich die bessere Beerntbarkeit auf Maschinenkosten, Gesamternteverluste, Qualität und Trocknung auswirkt. Hebt man die Stoppellänge um 10 Zentimeter an, lässt sich die Mähdrescherleistung um ca. 15 bis 20 Prozent steigern. Diese Beispiele unterstreichen zugleich die Forderung, dass die Druscheignung nicht erst zur Ernte diese Führungsrolle übernimmt, sondern auch in den vorgelagerten Verfahrensabschnitten als ein starkes Entscheidungskriterium gelten muss. / The parameter “threshability” of a stand is commonly assumed to be a criterion defined by the genetics of the strain and the weather conditions which is mainly not influenced by the farmer. Nevertheless, the farmer continuously changes the “threshability” with all his decisions, from the selection of the strains, via the use of fertilizers to the harvest management. For harvest, as the last stage of the process chain, the threshability develops extraordinarily high economic effects. On the basis of several examples from cultivation, plant nutrition, plant protection and harvest technology it was described, how the threshability can be influenced and how this effect is to be assessed monetarily. In the field of cultivation, the development of a new growth type of semi-dwarf rape has been selected, which yields competitive returns with less bio mass. Ripeness is more homogeneous, the harvest date can be fixed without problems, threshing is efficient and with low loss. Using the method of siccation, late and intensively controlled strains can be harvested earlier and easier. This offers harvest safety with low loss, higher combine harvester performance and reduced fuel consumption.The need-based spreading of nitrogen referring to type, quantity and time according to the small-scale spatial heterogeneity of a field leads to a homogenisation of the stands. The stands ripen more evenly and this fact causes about 20 percent higher combine harvester performance, as well as reduced fuel consumption. Using the example of high-cut top harvest it was clarified how the better harvestability influences the machine costs, the total harvest losses, the quality, and the drying process. If the length of the stubbles is extended by 10 centimetres, the combine harvester performance can be increased by 15 to 20 percent. These examples also emphasize the requirement that the threshability does not just take over the leading role for the harvest but has also to be considered as a strong decision criterion within the prior stages of the process.

The subject of this diploma thesis is the preparation of project documentation for the implementation of new sports and cultural centre Otradov. The dominant feature of the complex objects stands and multipurpose hall. The building is architecturally designed with an effort to fit in too much of rural architecture. Multipurpose hall has two floors, one third roofed flat roof, two-thirds of the roof ridge. The core system is aerated concrete blocks. The building is two-storey grandstand with the carrier deck. Roofing is solved by means of broken wooden beams. Sanitary facilities is dealt wall system and roofed shed roof. Athletics track, the surface of the polyurethane mixture designed for sports.