Controversy regarding use of genetically modified (GM) foods still persists in both developing and developed worlds. Proponents of genetically engineered foods argue this is a sustainable solution to resource-limited settings where food insecurity continues to increase. However, in this pertinent debate, there is deficiency of knowledge on the opinion of the general public from resource-limited African communities. The aim of this paper is to describe the general public's level of knowledge and perceptions towards use of GM foods in Zimbabwe. A descriptive cross sectional survey was conducted among 301 participants attending a country-wide Traditional and Organic Foods Festival in Harare. A self-administered questionnaire was used to collect data. Poor level of knowledge on GM foods was demonstrated among most respondents (60%) and associated with level of education (p<0.05). More than a third of respondents (36%) believed that GM chicken was being sold on Zimbabwean local markets. Lack of understanding on the genetic engineering process in food production was common among respondents. Attitude towards GM foods was negative and intention to consume GM foods was low (38%). Genetic engineering on food production was viewed as driven by a few companies for profit maximization (72%) with consequences for GM foods complex and too risky for humans (70%). Consumers believed a total of 44 GM foods were available on the Zimbabwean market with chicken, maize and fruits being common foods reported as GM foods. More than half (54%) of respondents reported to have consumed GM foods in the past even though GM foods are not permitted in the country. People with increased knowledge on genetic engineering and GM foods were more receptive of GM foods in their diets. Although intention to consume GM foods was high among individuals with increased knowledge and positive perceptions towards GMOs, knowledge and understanding on GM foods among study participants was limited. Positive perceptions, increased knowledge on genetic engineering and GM foods makes people more receptive of GM foods in their diets. There is need to improve consumer awareness on genetic engineering in food production to empower consumers to make informed choices regarding GM food. Consumers in resource-limited settings are sceptical of genetic modification in food and should be consulted during policy formulations on GM foods. Mandatory labelling of GM foods could also improve confidence among consumers on the foods they consume.
Consumption of edible insects as alternative animal protein-source is a potential longterm solution to curb protein deficiency in resource-limited communities where diets lacking in protein are predominant. Entomophagy has been expressed in both developed and developing countries, and previous studies have proven that edible insects are high in protein. However, there is paucity of information on protein quality of edible insects to adequately guide populations on their utilization as good alternative protein sources. The aim of this study was to evaluate protein quality of three edible insects commonly consumed in most regions of Zimbabwe, namely Imbrasia belina (mopane worms), Locusta migratoria (locust) and Encosternum delegorguei (stinkbug). Kjeldahl method was used to evaluate crude protein of edible insects and a 20-day mice-feeding trial was conducted to evaluate protein efficiency ratio and protein digestibility in comparison to a control protein (casein). Crude protein was higher in Locusta migratoria (71.2%) compared to Imbrasia belina (57.7%) and Encosternum delegorguei (31.3%). Protein efficiency ratio was lower in insect samples L. migratoria (2.3), I Belina (1.96), E. delegorguei (2.0) compared to control casein (2.5). There was a significant difference (p<0.05) in protein efficiency ratio between the three edible insects and casein. Protein digestibility of the three insects (I. belina-92%, L. migratoria-90%, E. delegorguei-92%) was high and comparable to that of casein (96%). There was no significant difference (p>0.05) in protein digestibility between the three insect protein sources and casein. The results showed high protein quality of three edible insects commonly consumed in Zimbabwe comparable to casein, a high quality animal protein. High protein digestibility of edible insects indicated ease in absorption and improved utilisation in the body. The lower PER values for I. Belina and E. delegorguei could possibly indicate that these edible insects may be limiting in the amino acids that support body tissue building and growth. Edible insects are a good source of quality protein that could meet protein requirements in resource-limited populations to curb protein deficiency. There is a strong need to further promote edible insects as a good alternative animal protein source.
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