Evidence map›Paper›PMID 28683156›Full record

ArticleIndoor air2018

Emission strength of airborne pathogens during toilet flushing.

A C K Lai, T F Tan, W S Li, D K M Ip

Abstract read
In one paragraph

Article in Indoor air, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing 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

21 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Technologies for pollutant removal and resource recovery from blackwater: a review.Frontiers of environmental science & engineering · 2023
    Review
  6. Article
  7. Review
  8. Observational
  9. Article
  10. Article
  11. Review
  12. Review
  13. Article
  14. Review
  15. Article
  16. Article
  17. Aerosol generation in public restrooms.Physics of fluids (Woodbury, N.Y. : 1994) · 2021
    Article
  18. The bioaerosols emitted from toilet and wastewater treatment plant: a literature review.Environmental science and pollution research international · 2021
    Review
  19. The COVID-19 pandemic: Considerations for the waste and wastewater services sector.Case studies in chemical and environmental engineering · 2020
    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

4 authors.

A C K LaiDepartment of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong.ORCID http://orcid.org/0000-0002-6202-1988
T F TanCity University of Hong Kong Shenzhen Research Institute, Shenzhen, China.
W S LiQueen Mary Hospital, Pokfulam, Hong Kong.
D K M IpSchool of Public Health, The University of Hong Kong, Pokfulam, Hong Kong.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The flushing of toilets generates contaminated aerosols, the transmission of which may cause the spread of disease, particularly in the immunocompromised or the elderly. This study investigated the emission strength of three types of airborne bacteria, namely Staphylococcus epidermidis, Escherichia coli, and Pseudomonas alcaligenes, during toilet flushing in a custom-built toilet under a controlled environment. Flushing was activated by a flushometer operated at two pressure levels, 400 kPa (high pressure [HP]) and 200 kPa (low pressure [LP]), and by a water cistern tank placed 95 cm (high tank [HT]) and 46 cm (low tank [LT]) above the toilet seat. The pathogens emitted by the first flush were calculated, with the correlations between airborne pathogen emissions and droplet concentration (HP, r=0.944, P<.001; LP, r=0.803, P<.001, HT, r=0.885, P<.05) and bacterial size (HP, r=-0.919, P<.001; LP, r=-0.936, P<.001; HT, r=-0.967, P<.05) in the different conditions then tested. The emission strength in the HP condition was statistically greater than that in the LP condition, whereas the cistern tank system produced less emissions than the flushometer system, and tank height was not found to be a sensitive parameter.

Indexed as

Air MicrobiologyToilet FacilitiesAerosolsAerosolsairborne transmitted pathogensemission strengthinfectious diseasessize-resolved emissionstoilet flushing-generated water dropletstoilet hygiene

Identifiers

PMID28683156
PMCPMC7165531

What OpenQuestion holds

Textmetadata
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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.