Abstract
| Original language | English |
|---|---|
| Title of host publication | IEEE 21st International Conference on Pulsed Power (PPC), 2017 |
| Place of Publication | Piscataway, N.J. |
| Publisher | IEEE |
| Number of pages | 5 |
| ISBN (Print) | 978-1-5090-5748-1 |
| DOIs | |
| Publication status | Published - 15 Feb 2018 |
| Event | IEEE International Pulsed Power Conference - the Hilton Metropole Hotel, Brighton, United Kingdom Duration: 18 Jun 2017 → 22 Jun 2017 Conference number: 21 |
Publication series
| Name | IEEE Pulsed Power Conference Proceedings |
|---|---|
| Publisher | IEEE |
| ISSN (Electronic) | 2158-4923 |
Conference
| Conference | IEEE International Pulsed Power Conference |
|---|---|
| Abbreviated title | PPC 2017 |
| Country | United Kingdom |
| City | Brighton |
| Period | 18/06/17 → 22/06/17 |
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Keywords
- microorganisms
- hospitals
- optical variables measurement
- aerosols
- light sources
Cite this
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Pulsed ultraviolet light decontamination of artificially-generated microbiological aerosols. / Dougall, L. R.; Gillespie, J. B.; MacLean, M.; Timoshkin, I. V.; Wilson, M. P.; MacGregor, S. J.
IEEE 21st International Conference on Pulsed Power (PPC), 2017. Piscataway, N.J. : IEEE, 2018. (IEEE Pulsed Power Conference Proceedings).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book
TY - GEN
T1 - Pulsed ultraviolet light decontamination of artificially-generated microbiological aerosols
AU - Dougall, L. R.
AU - Gillespie, J. B.
AU - MacLean, M.
AU - Timoshkin, I. V.
AU - Wilson, M. P.
AU - MacGregor, S. J.
PY - 2018/2/15
Y1 - 2018/2/15
N2 - Airborne transmission of infectious organisms is a major public health concern, particularly within healthcare and communal public environments. Methods of environmental decontamination utilising pulsed ultraviolet (UV) light are currently available, however it is important that germicidal efficacy against airborne contamination is established. In this study bacterial aerosols were generated and exposed to short duration pulses (~20 µs) of UV-rich light emitted from a xenon-filled flashlamp. The lamp was operated using a 1 kV solid–state pulsed power source, with a pulse frequency of 1 Hz, and output energy of 20 J/pulse. Post-treatment, air samples were extracted from the chamber and the surviving fraction was enumerated using standard microbiological culture methods. Results demonstrate successful aerosol inactivation, with a 92.1% reduction achieved with only 5 pulses of UV-rich light (P=<0.0002). Inactivation using continuous UV light was also investigated in order to quantify the comparative efficacy of these antimicrobial light sources. Overall, results provide evidence of the comparative efficacy of pulsed and continuous UV light for inactivation of airborne bacterial contamination. For practical application, given the safety restrictions limiting its application for decontamination of unoccupied environments, or within sealed enclosures such as air handling units, the reduced treatment times with PUV provides significant operational advantages over continuous light treatment.
AB - Airborne transmission of infectious organisms is a major public health concern, particularly within healthcare and communal public environments. Methods of environmental decontamination utilising pulsed ultraviolet (UV) light are currently available, however it is important that germicidal efficacy against airborne contamination is established. In this study bacterial aerosols were generated and exposed to short duration pulses (~20 µs) of UV-rich light emitted from a xenon-filled flashlamp. The lamp was operated using a 1 kV solid–state pulsed power source, with a pulse frequency of 1 Hz, and output energy of 20 J/pulse. Post-treatment, air samples were extracted from the chamber and the surviving fraction was enumerated using standard microbiological culture methods. Results demonstrate successful aerosol inactivation, with a 92.1% reduction achieved with only 5 pulses of UV-rich light (P=<0.0002). Inactivation using continuous UV light was also investigated in order to quantify the comparative efficacy of these antimicrobial light sources. Overall, results provide evidence of the comparative efficacy of pulsed and continuous UV light for inactivation of airborne bacterial contamination. For practical application, given the safety restrictions limiting its application for decontamination of unoccupied environments, or within sealed enclosures such as air handling units, the reduced treatment times with PUV provides significant operational advantages over continuous light treatment.
KW - microorganisms
KW - hospitals
KW - optical variables measurement
KW - aerosols
KW - light sources
UR - http://ieeexplore.ieee.org/document/8291260/
U2 - 10.1109/PPC.2017.8291260
DO - 10.1109/PPC.2017.8291260
M3 - Conference contribution book
SN - 978-1-5090-5748-1
T3 - IEEE Pulsed Power Conference Proceedings
BT - IEEE 21st International Conference on Pulsed Power (PPC), 2017
PB - IEEE
CY - Piscataway, N.J.
ER -