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Applied and Environmental Microbiology, August 1998, p. 3079-3083, Vol. 64, No. 8
KM Lab AB, 251 07 Helsingborg, Sweden
Received 6 January 1998/Accepted 7 May 1998
A total of 338 water samples, 261 drinking water samples and 77 bathing water samples, obtained for routine testing were analyzed in
duplicate by Swedish standard methods using multiple-tube fermentation or membrane filtration and by the Colilert and/or Enterolert
methods. Water samples came from a wide variety of sources in
southern Sweden (Skåne). The Colilert method was found to be more
sensitive than Swedish standard methods for detecting coliform
bacteria and of equal sensitivity for detecting Escherichia
coli when all drinking water samples were grouped together. Based
on these results, Swedac, the Swedish laboratory accreditation body,
approved for the first time in Sweden use of the Colilert method at
this laboratory for the analysis of all water sources not falling under
public water regulations (A-krav). The coliform detection study of
bathing water yielded anomalous results due to confirmation
difficulties. E. coli detection in bathing water was
similar by both the Colilert and Swedish standard methods as was fecal
streptococcus and enterococcus detection by both the Enterolert and
Swedish standard methods.
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Comparison of Membrane Filtration and Multiple-Tube Fermentation
by the Colilert and Enterolert Methods for Detection of Waterborne
Coliform Bacteria, Escherichia coli, and Enterococci
Used in Drinking and Bathing Water Quality Monitoring in
Southern Sweden
*
Present address: Colifast Systems ASA, P.O. Box 31, Strandveien 35, 1324 Lysaker, Norway. Phone: (47) 67 10 05 26. Fax:
(47) 67 10 05 20. E-mail: karl.eckner{at}colifast.no.
Applied and Environmental Microbiology, August 1998, p. 3079-3083, Vol. 64, No. 8
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
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