Effect of Ultraviolet Germicidal Irradiation on Viral Aerosols
Identifieur interne : 003829 ( Main/Exploration ); précédent : 003828; suivant : 003830Effect of Ultraviolet Germicidal Irradiation on Viral Aerosols
Auteurs : Christopher M. Walker [Corée du Sud] ; Gwangpyo Ko [Corée du Sud]Source :
- Environmental Science & Technology [ 0013-936x ] ; 2007.
Descripteurs français
- KwdFr :
- Aérosols (isolement et purification), Coronavirus (effets des radiations), Coronavirus (isolement et purification), Désinfection (), Humidité, Levivirus (effets des radiations), Levivirus (isolement et purification), Nébuliseurs et vaporisateurs, Rayons ultraviolets, Viabilité microbienne (effets des radiations), Virus (effets des radiations), Virus (isolement et purification).
- MESH :
- effets des radiations : Coronavirus, Levivirus, Viabilité microbienne, Virus.
- isolement et purification : Aérosols, Coronavirus, Levivirus, Virus.
- Désinfection, Humidité, Nébuliseurs et vaporisateurs, Rayons ultraviolets.
English descriptors
- KwdEn :
- Aerosols (isolation & purification), Coronavirus (isolation & purification), Coronavirus (radiation effects), Disinfection (methods), Humidity, Levivirus (isolation & purification), Levivirus (radiation effects), Microbial Viability (radiation effects), Nebulizers and Vaporizers, Ultraviolet Rays, Viruses (isolation & purification), Viruses (radiation effects).
- MESH :
- chemical , isolation & purification : Aerosols.
- isolation & purification : Coronavirus, Levivirus, Viruses.
- methods : Disinfection.
- radiation effects : Coronavirus, Levivirus, Microbial Viability, Viruses.
- Humidity, Nebulizers and Vaporizers, Ultraviolet Rays.
Abstract
Ultraviolet (UV) germicidal air disinfection is an engineering method used to control the airborne transmission of pathogenic microorganisms in high-risk settings. Despite the recent emergence of respiratory viral pathogens such as SARS and avian influenza viruses, UV disinfection of pathogenic viral aerosols has not been examined. Hence, we characterized the UV disinfection of viral aerosols using the bacteriophage MS2, adenovirus, and coronavirus. Our objectives were to characterize the effect of nebulization and air sampling on the survival of important viral pathogens, quantitatively characterize and estimate the UV susceptibility of pathogenic viral aerosols, and evaluate the effect of relative humidity (RH) on the susceptibility of viral aerosols, to 254 nm UV−C. The viruses were aerosolized into an experimental chamber using a six-jet Collison nebulizer, exposed to 254 nm UV, and sampled using an AGI-30 liquid impinger. Both the MS2 and adenovirus aerosols were very resistant to UV air disinfection, with a reduction of less than 1 logarithm in viable viral aerosols at a UV dose of 2608 μW s/cm2. The susceptibility of coronavirus aerosols was 7−10 times that of the MS2 and adenovirus aerosols. Unlike bacterial aerosols, there was no significant protective effect of high RH on UV susceptibility of the tested viral aerosols. We confirmed that the UV disinfection rate differs greatly between viral aerosols and viruses suspended in liquid.
Url:
DOI: 10.1021/es070056u
Affiliations:
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Technol.</title><idno type="ISSN">0013-936x</idno><idno type="eISSN">1520-5851</idno><imprint><publisher>American Chemical Society</publisher><date type="e-published">2007</date><date type="published">2007</date><biblScope unit="vol">41</biblScope><biblScope unit="issue">15</biblScope><biblScope unit="page" from="5460">5460</biblScope><biblScope unit="page" to="5465">5465</biblScope></imprint><idno type="ISSN">0013-936x</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0013-936x</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aerosols (isolation & purification)</term><term>Coronavirus (isolation & purification)</term><term>Coronavirus (radiation effects)</term><term>Disinfection (methods)</term><term>Humidity</term><term>Levivirus (isolation & purification)</term><term>Levivirus (radiation effects)</term><term>Microbial Viability (radiation effects)</term><term>Nebulizers and Vaporizers</term><term>Ultraviolet Rays</term><term>Viruses (isolation & purification)</term><term>Viruses (radiation effects)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Aérosols (isolement et purification)</term><term>Coronavirus (effets des radiations)</term><term>Coronavirus (isolement et purification)</term><term>Désinfection ()</term><term>Humidité</term><term>Levivirus (effets des radiations)</term><term>Levivirus (isolement et purification)</term><term>Nébuliseurs et vaporisateurs</term><term>Rayons ultraviolets</term><term>Viabilité microbienne (effets des radiations)</term><term>Virus (effets des radiations)</term><term>Virus (isolement et purification)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="isolation & purification" xml:lang="en"><term>Aerosols</term></keywords><keywords scheme="MESH" qualifier="effets des radiations" xml:lang="fr"><term>Coronavirus</term><term>Levivirus</term><term>Viabilité microbienne</term><term>Virus</term></keywords><keywords scheme="MESH" qualifier="isolation & purification" xml:lang="en"><term>Coronavirus</term><term>Levivirus</term><term>Viruses</term></keywords><keywords scheme="MESH" qualifier="isolement et purification" xml:lang="fr"><term>Aérosols</term><term>Coronavirus</term><term>Levivirus</term><term>Virus</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Disinfection</term></keywords><keywords scheme="MESH" qualifier="radiation effects" xml:lang="en"><term>Coronavirus</term><term>Levivirus</term><term>Microbial Viability</term><term>Viruses</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Humidity</term><term>Nebulizers and Vaporizers</term><term>Ultraviolet Rays</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Désinfection</term><term>Humidité</term><term>Nébuliseurs et vaporisateurs</term><term>Rayons ultraviolets</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract">Ultraviolet (UV) germicidal air disinfection is an engineering method used to control the airborne transmission of pathogenic microorganisms in high-risk settings. Despite the recent emergence of respiratory viral pathogens such as SARS and avian influenza viruses, UV disinfection of pathogenic viral aerosols has not been examined. Hence, we characterized the UV disinfection of viral aerosols using the bacteriophage MS2, adenovirus, and coronavirus. Our objectives were to characterize the effect of nebulization and air sampling on the survival of important viral pathogens, quantitatively characterize and estimate the UV susceptibility of pathogenic viral aerosols, and evaluate the effect of relative humidity (RH) on the susceptibility of viral aerosols, to 254 nm UV−C. The viruses were aerosolized into an experimental chamber using a six-jet Collison nebulizer, exposed to 254 nm UV, and sampled using an AGI-30 liquid impinger. Both the MS2 and adenovirus aerosols were very resistant to UV air disinfection, with a reduction of less than 1 logarithm in viable viral aerosols at a UV dose of 2608 μW s/cm2. The susceptibility of coronavirus aerosols was 7−10 times that of the MS2 and adenovirus aerosols. Unlike bacterial aerosols, there was no significant protective effect of high RH on UV susceptibility of the tested viral aerosols. We confirmed that the UV disinfection rate differs greatly between viral aerosols and viruses suspended in liquid.</div></front></TEI><affiliations><list><country><li>Corée du Sud</li></country><region><li>Région capitale de Séoul</li></region><settlement><li>Séoul</li></settlement></list><tree><country name="Corée du Sud"><region name="Région capitale de Séoul"><name sortKey="Walker, Christopher M" sort="Walker, Christopher M" uniqKey="Walker C" first="Christopher M." last="Walker">Christopher M. Walker</name></region><name sortKey="Ko, Gwangpyo" sort="Ko, Gwangpyo" uniqKey="Ko G" first="Gwangpyo" last="Ko">Gwangpyo Ko</name><name sortKey="Ko, Gwangpyo" sort="Ko, Gwangpyo" uniqKey="Ko G" first="Gwangpyo" last="Ko">Gwangpyo Ko</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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