Evidence map›Paper›PMID 31673047›Full record

ArticleScientific reports2019

A comparative assessment of conventional and molecular methods, including MinION nanopore sequencing, for surveying water quality.

Kishor Acharya, Santosh Khanal, Kalyan Pantha, Niroj Amatya, Russell J Davenport, David Werner

Open access · goldAbstract readComparative Study
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
4.3field-weighted citation impact, top 6% of its field
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

22 citing papers in PubMed, 62 citations in OpenAlex.

  1. Review
  2. Microbial and Chemical Water Quality Assessments Across the Rural and Urban Areas of Nepal: A Scoping Review.International journal of environmental research and public health · 2025
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. It's a Long Way to the Tap: Microbiome and DNA-Based Omics at the Core of Drinking Water Quality.International journal of environmental research and public health · 2022
    Review
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Article
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 at 4 institutions in 4 countries.

Kishor AcharyaSchool of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom.
Santosh KhanalDepartment of Pharmacology, School of Medicine, University of Colorado, Aurora, Colorado, 80045, USA.
Kalyan PanthaGroup for Rural Infrastructure Development, Wise use House, Jwagal, Lalitpur, Nepal.
Niroj AmatyaFaculty of Chemistry, University Duisburg-Essen, Universitätsstr. 5, D-45141, Essen, Germany.ORCID http://orcid.org/0000-0003-3398-7422
Russell J DavenportSchool of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom.
David WernerSchool of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom. david.werner@ncl.ac.uk.
Newcastle University · GBNepal Development Research Institute · NPPokhara University · NPUniversity of Colorado Anschutz Medical Campus · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Nucleic acid based techniques, such as quantitative PCR (qPCR) and next generation sequencing (NGS), provide new insights into microbial water quality, but considerable uncertainty remains around their correct interpretation. We demonstrate, for different water sources in informal settlements in the Kathmandu Valley, Nepal, significant Spearman rank correlations between conventional and molecular microbiology methods that indicate faecal contamination. At family and genera level, 16S rRNA amplicon sequencing results obtained with the low-cost, portable next generation sequencer MinION from Oxford Nanopore Technologies had significant Spearman rank correlations with Illumina MiSeq sequencing results. However, method validation by amplicon sequencing of a MOCK microbial community revealed the need to ascertain MinION sequencing results for putative pathogens at species level with complementary qPCR assays. Vibrio cholerae hazards were poorly associated with plate count faecal coliforms, but flagged up by the MinION screening method, and confirmed by a qPCR assay. Plate counting methods remain important to assess viability of faecal coliforms in disinfected water sources. We outline a systematic approach for data collection and interpretation of such complementary results. In the Kathmandu Valley, there is high variability of water quality from different sources, including for treated water samples, illustrating the importance of disinfection at the point of use.

Indexed as

NanoporesWater QualityDNA, BacterialHigh-Throughput Nucleotide SequencingMicrobiotaNepalDNA, Bacterial

Identifiers

PMID31673047
PMCPMC6823499
OpenAlexW2982514079

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.