Kussmaul H, Müller G, Mühlhausen D
Zentralbl Bakteriol Orig B. 1978 May;166(4-5):386-9.
As bacteriological examination of water often needs a longer time, it was tried to use chemical indicators for detecting sewage pollution of water. Such a chemical indicator is coprosterol, a sterin derivative, which is discharged from human and animal enteric systems. For epidemic evaluations, E. coli, normally not present in pure water, is a good fecal bacterial indicator. Wether there does exist a certain parallelity of the amount of coprosterol and the presence of E. coli, water from bankfiltration systems and coastal seawater were examined. The presence of E. coli was not in every case accompanied by a positive coprosterol test, so that epidemic evidence is not shown by the latter. Nevertheless, the test may be good to evaluate mixing procedures between two different kinds of sewage polluted water or between groundwater and surface water.
由于水的细菌学检测通常需要较长时间，因此尝试使用化学指标来检测水的污水污染情况。这样一种化学指标是粪甾醇，一种甾醇衍生物，它从人和动物的肠道系统排出。对于疫情评估而言，通常不存在于纯净水中的大肠杆菌是一种良好的粪便细菌指标。为了研究粪甾醇含量与大肠杆菌存在之间是否存在某种平行关系，对渗滤系统水和沿海海水进行了检测。大肠杆菌的存在并非在每种情况下都伴随着粪甾醇检测呈阳性，因此后者并未显示出疫情证据。尽管如此，该检测对于评估两种不同污水污染水之间或地下水与地表水之间的混合过程可能是有用的。
