Teagasc Environmental Research Centre, Johnstown Castle, Wexford, Ireland; The James Hutton Institute, Cragiebuckler, Aberdeen AB158QH, United Kingdom.
Sci Total Environ. 2014 Jan 15;468-469:302-5. doi: 10.1016/j.scitotenv.2013.08.037. Epub 2013 Sep 12.
Enteropathogens released into the environment can represent a serious risk to public health. Soil clay content has long been known to have an important effect on enteropathogen survival in soil, generally enhancing survival. However, clay mineral composition in soils varies, and different clay minerals have specific physiochemical properties that would be expected to impact differentially on survival. This work investigated the effect of clay materials, with a predominance of a particular mineral type (montmorillonite, kaolinite, or illite), on the survival in soil microcosms over 96 days of Listeria monocytogenes, Salmonella Dublin, and Escherichia coli O157. Clay mineral addition was found to alter a number of physicochemical parameters in soil, including cation exchange capacity and surface area, and this was specific to the mineral type. Clay mineral addition enhanced enteropathogen survival in soil. The type of clay mineral was found to differentially affect enteropathogen survival and the effect was enteropathogen-specific.
进入环境的病原体可能对公众健康构成严重威胁。土壤中的粘土含量长期以来一直被认为对土壤中病原体的存活有重要影响，通常会增强其存活能力。然而，土壤中的粘土矿物组成存在差异，不同的粘土矿物具有特定的物理化学特性，预计会对存活产生不同的影响。本研究调查了粘土材料（以特定矿物类型为主，如蒙脱石、高岭石或伊利石）对土壤微生境中李斯特菌、都柏林沙门氏菌和大肠杆菌 O157 存活的影响，为期 96 天。研究发现，粘土矿物的添加改变了土壤中的许多物理化学参数，包括阳离子交换容量和表面积，而且这是特定于矿物类型的。粘土矿物的添加增强了病原体在土壤中的存活。研究发现，粘土矿物的类型会对病原体的存活产生不同的影响，而且这种影响是病原体特异性的。
