Institute for Hygiene and Public Health, University of Bonn, Sigmund-Freud-Str. 25, 53105 Bonn, Germany.
Int J Hyg Environ Health. 2012 Nov;215(6):577-83. doi: 10.1016/j.ijheh.2011.12.008. Epub 2012 Jan 28.
In Germany, protozoal parasites are detected frequently in surface waters. This study aims to assess the parasitological pollution in a river course and two of its tributaries under regular weather conditions. Cryptosporidium was detected in 67% of all samples. The median concentration was 4 oocysts/100l. Giardia lamblia were detected in 90% of the samples. The median concentration of G. lamblia was 22 cysts/100l and increased significantly following the river course. A statistically significant correlation was found between both parasites and the faecal indicators Clostridium perfringens and Escherichia coli. The intermittent occurrence of Cryptosporidium in the streams investigated was ascribed primarily to diffuse pollution, particularly during rainfall events. The relatively frequent detection of G. lamblia derived mainly from sewage treatment plants. The pathogen concentrations observed present a relevant public health risk as the river is used for recreational activities and agricultural purposes.
在德国，经常在地表水检测到原生动物寄生虫。本研究旨在评估在常规天气条件下一条河流及其两条支流的寄生虫污染情况。在所有样本中，67%检测到隐孢子虫。隐孢子虫的中位数浓度为 4 个卵囊/100 升。在 90%的样本中检测到蓝氏贾第鞭毛虫。蓝氏贾第鞭毛虫的中位数浓度为 22 个囊包/100 升，且随着河流的流程而显著增加。发现这两种寄生虫与粪便指标梭状芽胞杆菌和大肠杆菌之间存在统计学上的显著相关性。在所研究的溪流中，隐孢子虫的间歇性出现主要归因于扩散污染，尤其是在降雨事件期间。蓝氏贾第鞭毛虫的相对频繁检测主要来自污水处理厂。由于河流被用于娱乐和农业用途，所观察到的病原体浓度对公共健康构成了相关风险。
