As part of AwwaRF #4024, the authors (together with 23 U.S. and 3 United Kingdom participating
utilities) have been investigating the relative performance of all methods
approved for the detection of coliforms and E.coli in drinking water in both the
U.S. and the United Kingdom. Initial investigations focussed on the sensitivity and specificity
of the various methods using both "seeded" and naturally contaminated samples.
Some extreme differences were noted very early on in the project. For example,
in spiked sample trials, some of the approved media failed to recover almost all
of the freeze dried bacteria added. For one of these media, similar results were
observed with naturally contaminated samples, while for another media a
completely different pattern of bacterial recovery was noted. This indicated that
while accurately counted freeze dried bacteria are useful in determining the
sensitivity of different culture media, care must be taken in interpreting results. In
experiments using these "bioballs", the range of recovery of 15 different media
was 0-95 positive samples. Includes tables.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 72 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 3 |
| Published : | 11/01/2007 |
