Short-range bioaerosol deposition and recovery of viable viruses and bacteria on surfaces from a cough and implications for respiratory disease transmission. Issue 2 (1st February 2021)
- Record Type:
- Journal Article
- Title:
- Short-range bioaerosol deposition and recovery of viable viruses and bacteria on surfaces from a cough and implications for respiratory disease transmission. Issue 2 (1st February 2021)
- Main Title:
- Short-range bioaerosol deposition and recovery of viable viruses and bacteria on surfaces from a cough and implications for respiratory disease transmission
- Authors:
- Wang, C. T.
Fu, S. C.
Chao, Christopher Y. H. - Abstract:
- Abstract: Knowledge of respiratory bacterium/virus distribution on surfaces is critical for studying disease transmission via the contact route. Here, we investigated the bioaerosol deposition and distribution on a surface from a cough experimentally. A cough generator was used to release bacterium/virus-laden droplets. A solid surface was placed in front of the cough generator at different relative distances ( D = 0.2, 0.5, 0.8, and 1.1 m) and angles ( θ= 30°, 60°, and 90°). Benign bacteria and bacteriophages were used separately. Results showed that droplet jet directly impinged upon the surface and then spread out along the surface. The distributions of droplet volume and viable microorganisms along the surface were unimodal. We then identified the impaction region based on the droplet flow field from a particle imaging velocimetry technique, which corresponded with the peak position and high-volume area. The impaction region contained around 83% of droplet volume along the vertical axis of the surface. The peak position, peak value, and width of the impaction region were related to D and θ . The micro-organisms inside the droplets did not affect the droplet distribution on near surfaces. The front surface can work as a partition to block the cough jet and protect people behind, and can be smaller when it is installed closer to the coughing person. This work demonstrates a methodology to obtain distribution and viability of microorganism deposited on surface, and suggestAbstract: Knowledge of respiratory bacterium/virus distribution on surfaces is critical for studying disease transmission via the contact route. Here, we investigated the bioaerosol deposition and distribution on a surface from a cough experimentally. A cough generator was used to release bacterium/virus-laden droplets. A solid surface was placed in front of the cough generator at different relative distances ( D = 0.2, 0.5, 0.8, and 1.1 m) and angles ( θ= 30°, 60°, and 90°). Benign bacteria and bacteriophages were used separately. Results showed that droplet jet directly impinged upon the surface and then spread out along the surface. The distributions of droplet volume and viable microorganisms along the surface were unimodal. We then identified the impaction region based on the droplet flow field from a particle imaging velocimetry technique, which corresponded with the peak position and high-volume area. The impaction region contained around 83% of droplet volume along the vertical axis of the surface. The peak position, peak value, and width of the impaction region were related to D and θ . The micro-organisms inside the droplets did not affect the droplet distribution on near surfaces. The front surface can work as a partition to block the cough jet and protect people behind, and can be smaller when it is installed closer to the coughing person. This work demonstrates a methodology to obtain distribution and viability of microorganism deposited on surface, and suggest guidelines to setting up a protective partition as a possible intervention method against disease transmission. Copyright © 2020 American Association for Aerosol Research … (more)
- Is Part Of:
- Aerosol science and technology. Volume 55:Issue 2(2021)
- Journal:
- Aerosol science and technology
- Issue:
- Volume 55:Issue 2(2021)
- Issue Display:
- Volume 55, Issue 2 (2021)
- Year:
- 2021
- Volume:
- 55
- Issue:
- 2
- Issue Sort Value:
- 2021-0055-0002-0000
- Page Start:
- 215
- Page End:
- 230
- Publication Date:
- 2021-02-01
- Subjects:
- Tiina Reponen
Aerosols -- Periodicals
Aerosol Propellants -- Periodicals
Aerosols -- Periodicals
660.294515 - Journal URLs:
- http://www.tandfonline.com/loi/uast20#.VkNQFJUnyig ↗
http://www.tandfonline.com/ ↗ - DOI:
- 10.1080/02786826.2020.1837340 ↗
- Languages:
- English
- ISSNs:
- 0278-6826
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 0729.835400
British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 15700.xml