Establishment of assay for bacterial contamination in source ofmineral water by using Limulus test.

建立了应用示踪试验法检测矿泉水水源细菌污染的检测系统。我们研究了日本的41种矿泉水。我们发现三种矿泉水的细菌污染约为8.9×10~(-3)~2.2×10~(-4)cfu/ml。此外，我们还在这三种矿泉水中的一种检测到了大肠菌群基因。这些结果表明，我们的检测系统对于检测矿泉水水源中的细菌污染是非常有用的。

We developed the assay system for the bacterial contamination in the source of mineral water by applying the Limulus test. We studied 41 of Japanese mineral waters. We found that the contamination of bacteria which is equivalent to about 8.9×10^3~2.2×10^4cfu/mlfrom three mineral waters. Furthermore, we detected the gene of coliform bacteria in one of these three mineral waters. From these results, it was demonstrated that our assay system is very useful for the detection of bacterial contamination in the source of mineral water.