Browsing by Author "Tywabi-Ngeva, Zikhona"

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    Assessment of heavy metals and health risks of street vended foods in the Mangaung Metro Municipality, Free State, South Africa
    (Elsevier, 2024-10-25) Letuka, Pontso; Nkhebenyane, Sebolelo; Tywabi-Ngeva, Zikhona
    Street food vending is part of the informal sector that plays a significant role 10 in improving socio-economic status of vendors and the food security of consumers. 11 However, this sector faces safety challenges mostly due to anthropogenic activities and 12 the lack of regulation. Chemical and heavy metal contamination from agricultural 13 practices and industrial activities are significant concerns. This study aimed to evaluate 14 heavy metal contamination in commonly vended foods-pap, chicken, pork and 15 moroho/salads- in the Free State, South Africa, and assess the associated health risks to 16 consumers. Shapiro-Wilk’s normality test and Kruskal-Wallis H tests were used to 17 evaluate differences between means, followed by Pairwise Comparison (p=0.05). 18 Results indicated heavy metal contamination in all analysed samples. The overall 19 median and IQR of As, Cd, Cr, Cu, Fe, Pb, and Zn in descending order Fe 4.365(4.424), 20 Zn 3.605(3.711), As 2.653(2.971), Pb 1.095(1.266), Cu 0.271(0.326), Cr 0.212(0.117) and Zn 0.023(0.027) mg/kg. Multiple pairwise comparisons showed a statistically significant difference (p <0.05) for As between all pairs, while other heavy metals showed some variations without statistical significance. The EDI values of pap, chicken, pork and moroho/salads were below the recommended dietary values, suggesting the heavy metals may not pose a public health risk. The health risk assessment through ICLR and Hazard Index (HI) indicated potential cancer and non-cancer risks from heavy metals in street-vended foods, as ICLR≥10-3 and HI >1. This implies that habitual consumers are at risk of non-carcinogenic health conditions
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    Nutrition knowledge and attitudes of street food handlers in Mangaung Metro Municipality in free state, South Africa
    (Asia Pacific Academy of Science Pty Ltd, 2024-02-02) Letuka, Pontso Joyce; Nkhebenyane, Jane; Tywabi-Ngeva, Zikhona
    Nutritious and safe food is essential for good health. However not all food handlers especially in the street food trade know how to or are willing to prepare nutritiously balanced meals. Many non-communicable diseases are associated with poor diets, this therefore implies that habitual consumers of street vended foods could be at risk. This study therefore aimed to analyze the nutrition knowledge and attitudes of street food handlers as well as the food types sold. The study followed a cross-sectional, quantitative design using a peer reviewed questionnaire to obtain street food handler demographics, nutrition knowledge, attitudes and food types sold. Questionnaires were administered to 100 food vendors (June–August 2022) with more females (57%) than males (43%) in the sample. The nutrition knowledge responses given by vendors are indicative of a satisfactory knowledge level. None of the participants scored below 33% (i.e., ≤5/15). The vendors had positive attitudes towards nutrition. However, the meals they sold such as fat cakes and processed meats, were mostly fat and energy dense, and these have a potential to cause health issues such obesity and cardiovascular diseases. Studies on nutrition knowledge especially among this demographic are significantly fewer, and no other study of this kind has been conducted in the Free State.