Evidence map›Paper›PMID 25658685›Full record

ArticleInternational journal of environmental research and public health2015

On-line monitoring of Escherichia coli in raw water at Oset drinking water treatment plant, Oslo (Norway).

Ingun Tryland, Fasil Ejigu Eregno, Henrik Braathen, Goran Khalaf, Ingrid Sjølander, Marie Fossum

Abstract readEvaluation Study
In one paragraph

Article in International journal of environmental research and public health, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Ingun TrylandNorwegian Institute for Water Research, Gaustadalléen 21, Oslo 0349, Norway. Ingun.Tryland@niva.no.
Fasil Ejigu EregnoNorwegian University of Life Sciences, Ås 1432, Norway. fasil.eregno@nmbu.no.
Henrik BraathenColifast AS, Strandveien 33, Lysaker 1366, Norway. hb@colifast.no.
Goran KhalafColifast AS, Strandveien 33, Lysaker 1366, Norway. gk@colifast.no.
Ingrid SjølanderOslo Water and Sewerage Works, Midtoddveien 40, Oslo 0494, Norway. ingrid.sjolander@vav.oslo.kommune.no.
Marie FossumOslo Water and Sewerage Works, Midtoddveien 40, Oslo 0494, Norway. marie.fossum@vav.oslo.kommune.no.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The fully automated Colifast ALARM™ has been used for two years for daily monitoring of the presence/absence of Escherichia coli in 100 mL raw water at Oset drinking water treatment plant in Oslo, Norway. The raw water is extracted from 35 m depth from the Lake Maridalsvannet. E. coli was detected in 18% of the daily samples. In general, most samples positive for E. coli were observed during the autumn turnover periods, but even in some samples taken during warm and dry days in July, with stable temperature stratification in the lake, E. coli was detected. The daily samples gave useful additional information compared with the weekly routine samples about the hygienic raw water quality and the hygienic barrier efficiency of the lake under different weather conditions and seasons. The winter 2013/2014 was much warmer than the winter 2012/2013. The monitoring supported the hypothesis that warmer winters with shorter periods with ice cover on lakes, which may be a consequence of climate changes, may reduce the hygienic barrier efficiency in deep lakes used as drinking water sources.

Indexed as

Water MicrobiologyClimate ChangeDrinking WaterEnvironmental MonitoringEscherichia coliInternetLakesNorwaySeasonsTemperatureWater PurificationWeatherDrinking Water

Identifiers

PMID25658685
PMCPMC4344693

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.