کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4485483 | 1316954 | 2008 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Comparison of a novel MPN method against the yeast extract agar (YEA) pour plate method for the enumeration of heterotrophic bacteria from drinking water Comparison of a novel MPN method against the yeast extract agar (YEA) pour plate method for the enumeration of heterotrophic bacteria from drinking water](/preview/png/4485483.png)
This study compared the Quanti-Disc™ most probable number (MPN) test for heterotrophic bacteria from drinking water with the widely used yeast extract agar (YEA) pour plate method. The Quanti-Disc™ test module contains 50 reaction wells in which a medium has been pre-deposited. The medium contains a suite of three fluorogenic enzyme substrates selected for the detection of enzymes expressed widely by heterotrophic bacteria. The MPN of heterotrophic bacteria is calculated from the number of fluorescing reaction wells after incubation of a sample. Quanti-Disc™ and the YEA pour plate method were compared according to guidance on comparing methods given in United Kingdom national guidance and ISO 17994:2004. The two methods were also challenged with reference strains and isolates of heterotrophic bacteria from drinking water. This indicated that heterotrophic bacteria commonly encountered in drinking water are detected by both the YEA pour plate method and Quanti-Disc™. Analysis of data from split water samples (723 for 37 °C tests and 872 for 22 °C tests) from nine geographically diverse laboratories in England and Wales demonstrated that the Quanti-Disc™ method is equivalent to the YEA pour plate method for the analysis of heterotrophic bacteria from drinking and similar waters at 37 °C, and superior to YEA for the analysis at 22 °C. The Quanti-Disc™ method is a simple and efficient alternative method for the enumeration of heterotrophic bacteria from drinking water.
Journal: Water Research - Volume 42, Issue 13, July 2008, Pages 3489–3497