Kasozi Keneth Iceland, Otim Eric Oloya, Zirintunda Gerald, Tamale Andrew, Otim Ochan
School of Medicine, Kabale University, Box 317, Kabale, Uganda.
College of Engineering and Sciences, Purdue University Northwestern, IN, USA.
Toxicol Rep. 2023 Mar 21;10:400-408. doi: 10.1016/j.toxrep.2023.03.004. eCollection 2023.
Information about food hygiene and quality in the sub-Saharan African countries remains scarce at a time when many of their citizenry are beginning to acquire the much coveted middle income status. Confounding this are challenges linked to monitoring on a continuous basis the safety of food produced by such lucrative industries as the beef industry. The objective of the current study was to initiate a process of encouraging changes in the status quo, by showing how a first step in that direction might look like. Using heavy metal contents of representative beef samples from butcheries in Soroti, Uganda, typical of a sub-Saharan country, we demonstrate how relationships and common sources of metals in food could be identified in a multivariate space. Beef samples from 40 sites were analyzed by atomic absorption spectrometry for iron (Fe), zinc (Zn), nickel (Ni), chromium (Cr), lead (Pb), copper (Cu), cobalt (Co) and cadmium (Cd). The study showed that all beef samples contained these metals, the extent of which were in the order: Fe > Zn >> Ni, Cr > Pb > Cu, Co > Cd. By correlation analysis, the pairs Ni and Cr, Cd and Co, Ni and Fe or Cr and Fe were found to be most likely coming from similar sources. At least three distinct characteristics of beef consumed in Soroti were also found, a distinction perhaps arising from three major categories of feedlots used to raise donor cattle. The incremental risk of children or adults developing cancer over a lifetime was estimated and found to fall into three categories, two of which are separately explained by the presence of Cr or Ni. The sources of these metals remain a matter of speculation on our part. More studies are needed to determine these sources and to understand the nature of cancer risk in the three categories of beef identified here.
在撒哈拉以南非洲国家,当许多公民开始获得令人向往的中等收入地位时,有关食品卫生和质量的信息仍然匮乏。与此相关的是,要持续监测牛肉行业等利润丰厚行业生产的食品安全性面临诸多挑战。本研究的目的是通过展示朝着这个方向迈出的第一步可能是什么样子,来启动一个鼓励改变现状的过程。我们以乌干达索罗蒂(典型的撒哈拉以南国家)肉店具有代表性的牛肉样本中的重金属含量为例,展示了如何在多变量空间中识别食品中金属的关系和常见来源。通过原子吸收光谱法对来自40个地点的牛肉样本进行了铁(Fe)、锌(Zn)、镍(Ni)、铬(Cr)、铅(Pb)、铜(Cu)、钴(Co)和镉(Cd)的分析。研究表明,所有牛肉样本都含有这些金属,其含量程度依次为:Fe > Zn >> Ni、Cr > Pb > Cu、Co > Cd。通过相关性分析,发现镍和铬、镉和钴、镍和铁或铬和铁这几对金属最有可能来自相似来源。还发现了索罗蒂消费的牛肉至少有三个明显特征,这种差异可能源于用于饲养供体牛的三大类饲养场。估计了儿童或成人一生中患癌症的增量风险,发现其分为三类,其中两类分别由铬或镍的存在来解释。这些金属的来源在我们看来仍是一个推测的问题。需要更多研究来确定这些来源,并了解这里确定的三类牛肉中癌症风险的性质。