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Viable influenza A virus in airborne particles expelled during coughs versus exhalations

Identifieur interne : 001B47 ( Ncbi/Merge ); précédent : 001B46; suivant : 001B48

Viable influenza A virus in airborne particles expelled during coughs versus exhalations

Auteurs : William G. Lindsley ; Francoise M. Blachere ; Donald H. Beezhold ; Robert E. Thewlis ; Bahar Noorbakhsh ; Sreekumar Othumpangat ; William T. Goldsmith ; Cynthia M. Mcmillen ; Michael E. Andrew ; Carmen N. Burrell ; John D. Noti

Source :

RBID : PMC:4947941

Descripteurs français

English descriptors

Abstract

Background

To prepare for a possible influenza pandemic, a better understanding of the potential for the airborne transmission of influenza from person to person is needed.

Objectives

The objective of this study was to directly compare the generation of aerosol particles containing viable influenza virus during coughs and exhalations.

Methods

Sixty‐one adult volunteer outpatients with influenza‐like symptoms were asked to cough and exhale three times into a spirometer. Aerosol particles produced during coughing and exhalation were collected into liquid media using aerosol samplers. The samples were tested for the presence of viable influenza virus using a viral replication assay (VRA).

Results

Fifty‐three test subjects tested positive for influenza A virus. Of these, 28 (53%) produced aerosol particles containing viable influenza A virus during coughing, and 22 (42%) produced aerosols with viable virus during exhalation. Thirteen subjects had both cough aerosol and exhalation aerosol samples that contained viable virus, 15 had positive cough aerosol samples but negative exhalation samples, and 9 had positive exhalation samples but negative cough samples.

Conclusions

Viable influenza A virus was detected more often in cough aerosol particles than in exhalation aerosol particles, but the difference was not large. Because individuals breathe much more often than they cough, these results suggest that breathing may generate more airborne infectious material than coughing over time. However, both respiratory activities could be important in airborne influenza transmission. Our results are also consistent with the theory that much of the aerosol containing viable influenza originates deep in the lungs.


Url:
DOI: 10.1111/irv.12390
PubMed: 26991074
PubMed Central: 4947941

Links toward previous steps (curation, corpus...)


Links to Exploration step

PMC:4947941

Le document en format XML

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<title>Background</title>
<p>To prepare for a possible influenza pandemic, a better understanding of the potential for the airborne transmission of influenza from person to person is needed.</p>
</sec>
<sec id="irv12390-sec-0002">
<title>Objectives</title>
<p>The objective of this study was to directly compare the generation of aerosol particles containing viable influenza virus during coughs and exhalations.</p>
</sec>
<sec id="irv12390-sec-0003">
<title>Methods</title>
<p>Sixty‐one adult volunteer outpatients with influenza‐like symptoms were asked to cough and exhale three times into a spirometer. Aerosol particles produced during coughing and exhalation were collected into liquid media using aerosol samplers. The samples were tested for the presence of viable influenza virus using a viral replication assay (
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<title>Results</title>
<p>Fifty‐three test subjects tested positive for influenza A virus. Of these, 28 (53%) produced aerosol particles containing viable influenza A virus during coughing, and 22 (42%) produced aerosols with viable virus during exhalation. Thirteen subjects had both cough aerosol and exhalation aerosol samples that contained viable virus, 15 had positive cough aerosol samples but negative exhalation samples, and 9 had positive exhalation samples but negative cough samples.</p>
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<p>Viable influenza A virus was detected more often in cough aerosol particles than in exhalation aerosol particles, but the difference was not large. Because individuals breathe much more often than they cough, these results suggest that breathing may generate more airborne infectious material than coughing over time. However, both respiratory activities could be important in airborne influenza transmission. Our results are also consistent with the theory that much of the aerosol containing viable influenza originates deep in the lungs.</p>
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<affiliation>
<nlm:aff id="irv12390-aff-0001"></nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Mcmillen, Cynthia M" sort="Mcmillen, Cynthia M" uniqKey="Mcmillen C" first="Cynthia M." last="Mcmillen">Cynthia M. Mcmillen</name>
<affiliation>
<nlm:aff id="irv12390-aff-0001"></nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Andrew, Michael E" sort="Andrew, Michael E" uniqKey="Andrew M" first="Michael E." last="Andrew">Michael E. Andrew</name>
<affiliation>
<nlm:aff id="irv12390-aff-0001"></nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Burrell, Carmen N" sort="Burrell, Carmen N" uniqKey="Burrell C" first="Carmen N." last="Burrell">Carmen N. Burrell</name>
<affiliation>
<nlm:aff id="irv12390-aff-0002"></nlm:aff>
</affiliation>
</author>
<author>
<name sortKey="Noti, John D" sort="Noti, John D" uniqKey="Noti J" first="John D." last="Noti">John D. Noti</name>
<affiliation>
<nlm:aff id="irv12390-aff-0001"></nlm:aff>
</affiliation>
</author>
</analytic>
<series>
<title level="j">Influenza and Other Respiratory Viruses</title>
<idno type="ISSN">1750-2640</idno>
<idno type="eISSN">1750-2659</idno>
<imprint>
<date when="2016">2016</date>
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<front>
<div type="abstract" xml:lang="en">
<sec id="irv12390-sec-0001">
<title>Background</title>
<p>To prepare for a possible influenza pandemic, a better understanding of the potential for the airborne transmission of influenza from person to person is needed.</p>
</sec>
<sec id="irv12390-sec-0002">
<title>Objectives</title>
<p>The objective of this study was to directly compare the generation of aerosol particles containing viable influenza virus during coughs and exhalations.</p>
</sec>
<sec id="irv12390-sec-0003">
<title>Methods</title>
<p>Sixty‐one adult volunteer outpatients with influenza‐like symptoms were asked to cough and exhale three times into a spirometer. Aerosol particles produced during coughing and exhalation were collected into liquid media using aerosol samplers. The samples were tested for the presence of viable influenza virus using a viral replication assay (
<styled-content style="fixed-case">VRA</styled-content>
).</p>
</sec>
<sec id="irv12390-sec-0004">
<title>Results</title>
<p>Fifty‐three test subjects tested positive for influenza A virus. Of these, 28 (53%) produced aerosol particles containing viable influenza A virus during coughing, and 22 (42%) produced aerosols with viable virus during exhalation. Thirteen subjects had both cough aerosol and exhalation aerosol samples that contained viable virus, 15 had positive cough aerosol samples but negative exhalation samples, and 9 had positive exhalation samples but negative cough samples.</p>
</sec>
<sec id="irv12390-sec-0005">
<title>Conclusions</title>
<p>Viable influenza A virus was detected more often in cough aerosol particles than in exhalation aerosol particles, but the difference was not large. Because individuals breathe much more often than they cough, these results suggest that breathing may generate more airborne infectious material than coughing over time. However, both respiratory activities could be important in airborne influenza transmission. Our results are also consistent with the theory that much of the aerosol containing viable influenza originates deep in the lungs.</p>
</sec>
</div>
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<term>Adult</term>
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<term>Exhalation</term>
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<term>Humains</term>
<term>Jeune adulte</term>
<term>Microbiologie de l'air</term>
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<term>Pandémies</term>
<term>Réplication virale</term>
<term>Spirométrie</term>
<term>Viabilité microbienne</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">To prepare for a possible influenza pandemic, a better understanding of the potential for the airborne transmission of influenza from person to person is needed.</div>
</front>
</TEI>
</pubmed>
</double>
</record>

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