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首页> 美国卫生研究院文献>Toxins >Variation in Occurrence and Aflatoxigenicity of Aspergillus flavus from Two Climatically Varied Regions in Kenya
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Variation in Occurrence and Aflatoxigenicity of Aspergillus flavus from Two Climatically Varied Regions in Kenya

机译：肯尼亚两个气候变化地区的黄曲霉的发生和黄曲霉毒性的变化

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Aflatoxins are carcinogenic chemical metabolites produced by spp. of the section In Kenya, is the most prevalent and has been associated with several acute and chronic aflatoxin outbreaks in the past. In this study, we evaluated the occurrence of in soils from two agro-ecological regions with contrasting climatic conditions, aflatoxin contamination histories and cropping systems. spp. were first isolated from soils before the identification and determination of their aflatoxigenicity. Further, we determined the occurrence of and spp. in soils from the two regions. These bacterial species have long been associated with biological control of several plant pathogens including spp. Our results show that occurred widely and produced comparatively higher total aflatoxin levels in all (100%) study sites from the eastern to the western regions of Kenya. For the western region, was detected in 4 locations (66.7%) that were previously under maize cultivation with the isolates showing low aflatoxigenicity. was not isolated from soils under sugarcane cultivation. Distribution of the two bacterial species varied across the regions but we detected a weak relationship between occurrence of bacterial species and . We discuss these findings in the context of the influence of climate, microbial profiles, cropping systems and applicability in the deployment of biological control remedies against aflatoxin contamination.
机译：黄曲霉毒素是由spp产生的致癌化学代谢物。在肯尼亚，该病最流行，过去曾与几次急性和慢性黄曲霉毒素爆发有关。在这项研究中，我们通过气候条件，黄曲霉毒素污染史和耕作制度的对比，评估了两个农业生态区域土壤中的发生情况。 spp。首先从土壤中分离出黄曲霉毒素，然后进行黄曲霉毒素的鉴定和测定。此外，我们确定了和spp的出现。在两个地区的土壤中。这些细菌种类长期以来与包括spp在内的几种植物病原体的生物防治有关。我们的结果表明，从肯尼亚的东部到西部，所有（100％）研究地点的黄曲霉毒素总含量普遍存在并且相对较高。在西部地区，以前在玉米栽培中的4个位置（66.7％）被检测到，分离株显示出较低的黄曲霉毒性。不是从甘蔗种植的土壤中分离出来的。两种细菌种类的分布在整个地区有所不同，但我们发现细菌种类与细菌之间的关系较弱。我们将在气候，微生物分布，种植系统以及针对黄曲霉毒素污染的生物防治药物的部署中的适用性的背景下讨论这些发现。

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