Manyi-Loh Christy E, Lues Ryk
Centre of Applied Food Sustainability and Biotechnology, Central University of Technology, Bloemfontein 9301, South Africa.
Microorganisms. 2023 Oct 3;11(10):2484. doi: 10.3390/microorganisms11102484.
Meat comprises proteins, fats, vitamins, and trace elements, essential nutrients for the growth and development of the body. The increased demand for meat necessitates the use of antibiotics in intensive farming to sustain and raise productivity. However, the high water activity, the neutral pH, and the high protein content of meat create a favourable milieu for the growth and the persistence of bacteria. Meat serves as a portal for the spread of foodborne diseases. This occurs because of contamination. This review presents information on animal farming in South Africa, the microbial and chemical contamination of meat, and the consequential effects on public health. In South Africa, the sales of meat can be operated both formally and informally. Meat becomes exposed to contamination with different categories of microbes, originating from varying sources during preparation, processing, packaging, storage, and serving to consumers. Apparently, meat harbours diverse pathogenic microorganisms and antibiotic residues alongside the occurrence of drug resistance in zoonotic pathogens, due to the improper use of antibiotics during farming. Different findings obtained across the country showed variations in prevalence of bacteria and multidrug-resistant bacteria studied, which could be explained by the differences in the manufacturer practices, handling processes from producers to consumers, and the success of the hygienic measures employed during production. Furthermore, variation in the socioeconomic and political factors and differences in bacterial strains, geographical area, time, climatic factors, etc. could be responsible for the discrepancy in the level of antibiotic resistance between the provinces. Bacteria identified in meat including , , , spp., spp., etc. are incriminated as pathogenic agents causing serious infections in human and their drug-resistant counterparts can cause prolonged infection plus long hospital stays, increased mortality and morbidity as well as huge socioeconomic burden and even death. Therefore, uncooked meat or improperly cooked meat consumed by the population serves as a risk to human health.
肉类包含蛋白质、脂肪、维生素和微量元素,这些都是身体生长发育所必需的营养物质。对肉类需求的增加使得集约化养殖中必须使用抗生素以维持和提高产量。然而,肉类的高水分活性、中性pH值和高蛋白含量为细菌的生长和持续存在创造了有利环境。肉类成为食源性疾病传播的一个途径。这是由污染导致的。本综述介绍了南非的畜牧业、肉类的微生物和化学污染以及对公众健康的相应影响。在南非,肉类销售既有正规渠道也有非正规渠道。在制备、加工、包装、储存以及向消费者供应的过程中,肉类会接触到来自不同来源的各类微生物污染。显然,由于养殖过程中抗生素的不当使用,肉类中存在多种致病微生物、抗生素残留以及人畜共患病原体的耐药性问题。在全国范围内获得的不同研究结果显示,所研究的细菌和多重耐药细菌的流行率存在差异,这可以通过生产厂家的做法、从生产者到消费者的处理过程以及生产过程中所采用卫生措施的成效差异来解释。此外,社会经济和政治因素的差异以及细菌菌株、地理区域、时间、气候因素等的不同,可能是各省抗生素耐药水平存在差异的原因。在肉类中鉴定出的细菌包括 、 、 属、 属等,它们被认定为导致人类严重感染的病原体,其耐药菌株可导致感染时间延长、住院时间延长、死亡率和发病率增加,以及巨大的社会经济负担甚至死亡。因此,人们食用未煮熟或烹饪不当的肉类会对人类健康构成风险。