Comparison of Patients Hospitalized With Pandemic 2009 Influenza A (H1N1) Virus Infection During the First Two Pandemic Waves in Wisconsin
Identifieur interne : 000715 ( Pmc/Corpus ); précédent : 000714; suivant : 000716Comparison of Patients Hospitalized With Pandemic 2009 Influenza A (H1N1) Virus Infection During the First Two Pandemic Waves in Wisconsin
Auteurs : Shaun A. Truelove ; Amit S. Chitnis ; Richard T. Heffernan ; Amy E. Karon ; Thomas E. Haupt ; Jeffrey P. DavisSource :
- The Journal of Infectious Diseases [ 0022-1899 ] ; 2011.
Abstract
Url:
DOI: 10.1093/infdis/jiq117
PubMed: 21278213
PubMed Central: 3071126
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PMC:3071126Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Comparison of Patients Hospitalized With Pandemic 2009 Influenza A (H1N1) Virus Infection During the First Two Pandemic Waves in Wisconsin</title>
<author><name sortKey="Truelove, Shaun A" sort="Truelove, Shaun A" uniqKey="Truelove S" first="Shaun A." last="Truelove">Shaun A. Truelove</name>
</author>
<author><name sortKey="Chitnis, Amit S" sort="Chitnis, Amit S" uniqKey="Chitnis A" first="Amit S." last="Chitnis">Amit S. Chitnis</name>
</author>
<author><name sortKey="Heffernan, Richard T" sort="Heffernan, Richard T" uniqKey="Heffernan R" first="Richard T." last="Heffernan">Richard T. Heffernan</name>
</author>
<author><name sortKey="Karon, Amy E" sort="Karon, Amy E" uniqKey="Karon A" first="Amy E." last="Karon">Amy E. Karon</name>
</author>
<author><name sortKey="Haupt, Thomas E" sort="Haupt, Thomas E" uniqKey="Haupt T" first="Thomas E." last="Haupt">Thomas E. Haupt</name>
</author>
<author><name sortKey="Davis, Jeffrey P" sort="Davis, Jeffrey P" uniqKey="Davis J" first="Jeffrey P." last="Davis">Jeffrey P. Davis</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Comparison of Patients Hospitalized With Pandemic 2009 Influenza A (H1N1) Virus Infection During the First Two Pandemic Waves in Wisconsin</title>
<author><name sortKey="Truelove, Shaun A" sort="Truelove, Shaun A" uniqKey="Truelove S" first="Shaun A." last="Truelove">Shaun A. Truelove</name>
</author>
<author><name sortKey="Chitnis, Amit S" sort="Chitnis, Amit S" uniqKey="Chitnis A" first="Amit S." last="Chitnis">Amit S. Chitnis</name>
</author>
<author><name sortKey="Heffernan, Richard T" sort="Heffernan, Richard T" uniqKey="Heffernan R" first="Richard T." last="Heffernan">Richard T. Heffernan</name>
</author>
<author><name sortKey="Karon, Amy E" sort="Karon, Amy E" uniqKey="Karon A" first="Amy E." last="Karon">Amy E. Karon</name>
</author>
<author><name sortKey="Haupt, Thomas E" sort="Haupt, Thomas E" uniqKey="Haupt T" first="Thomas E." last="Haupt">Thomas E. Haupt</name>
</author>
<author><name sortKey="Davis, Jeffrey P" sort="Davis, Jeffrey P" uniqKey="Davis J" first="Jeffrey P." last="Davis">Jeffrey P. Davis</name>
</author>
</analytic>
<series><title level="j">The Journal of Infectious Diseases</title>
<idno type="ISSN">0022-1899</idno>
<idno type="eISSN">1537-6613</idno>
<imprint><date when="2011">2011</date>
</imprint>
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<front><div type="abstract" xml:lang="en"><p><bold><italic>Background.</italic>
</bold>
Wisconsin was severely affected by pandemic waves of 2009 influenza A H1N1 infection during the period 15 April through 30 August 2009 (wave 1) and 31 August 2009 through 2 January 2010 (wave 2).</p>
<p><bold><italic>Methods.</italic>
</bold>
To evaluate differences in epidemiologic features and outcomes during these pandemic waves, we examined prospective surveillance data on Wisconsin residents who were hospitalized ≥24 h with or died of pandemic H1N1 infection.</p>
<p><bold><italic>Results.</italic>
</bold>
Rates of hospitalizations and deaths from pandemic H1N1 infection in Wisconsin increased 4- and 5-fold, respectively, from wave 1 to wave 2; outside Milwaukee, hospitalization and death rates increased 10- and 8-fold, respectively. Hospitalization rates were highest among racial and ethnic minorities and children during wave 1 and increased most during wave 2 among non-Hispanic whites and adults. Times to hospital admission and antiviral treatment improved between waves, but the overall hospital course remained similar, with no change in hospitalization duration, intensive care unit admission, requirement for mechanical ventilation, or mortality.</p>
<p><bold><italic>Conclusions.</italic>
</bold>
We report broader geographic spread and marked demographic differences during pandemic wave 2, compared with wave 1, although clinical outcomes were similar. Our findings emphasize the importance of using comprehensive surveillance data to detect changing characteristics and impacts during an influenza pandemic and of vigorously promoting influenza vaccination and other prevention efforts.</p>
</div>
</front>
</TEI>
<pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">J Infect Dis</journal-id>
<journal-id journal-id-type="hwp">jinfdis</journal-id>
<journal-id journal-id-type="publisher-id">jinfdis</journal-id>
<journal-title-group><journal-title>The Journal of Infectious Diseases</journal-title>
</journal-title-group>
<issn pub-type="ppub">0022-1899</issn>
<issn pub-type="epub">1537-6613</issn>
<publisher><publisher-name>Oxford University Press</publisher-name>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">21278213</article-id>
<article-id pub-id-type="pmc">3071126</article-id>
<article-id pub-id-type="doi">10.1093/infdis/jiq117</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Major Articles and Brief Reports</subject>
<subj-group><subject>Viruses</subject>
</subj-group>
</subj-group>
</article-categories>
<title-group><article-title>Comparison of Patients Hospitalized With Pandemic 2009 Influenza A (H1N1) Virus Infection During the First Two Pandemic Waves in Wisconsin</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Truelove</surname>
<given-names>Shaun A.</given-names>
</name>
</contrib>
<contrib contrib-type="author"><name><surname>Chitnis</surname>
<given-names>Amit S.</given-names>
</name>
<xref ref-type="author-notes" rid="fn1">a</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Heffernan</surname>
<given-names>Richard T.</given-names>
</name>
</contrib>
<contrib contrib-type="author"><name><surname>Karon</surname>
<given-names>Amy E.</given-names>
</name>
<xref ref-type="author-notes" rid="fn2">b</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Haupt</surname>
<given-names>Thomas E.</given-names>
</name>
</contrib>
<contrib contrib-type="author" corresp="yes"><name><surname>Davis</surname>
<given-names>Jeffrey P.</given-names>
</name>
</contrib>
</contrib-group>
<aff>Bureau of Communicable Diseases and Emergency Response, Wisconsin Division of Public Health, Madison, Wisconsin</aff>
<author-notes><corresp>Reprints or correspondence: Jeffrey P. Davis, MD, Chief Medical Officer and State Epidemiologist, Bureau of Communicable Diseases and Emergency Response, Wisconsin Division of Public Health, 1 West Wilson Street, PO Box 2659, Madison, WI 53701-2659 (<email>jeffrey.davis@wisconsin.gov</email>
).</corresp>
<fn><p>Potential conflicts of interest: none reported.</p>
</fn>
<fn id="fn1"><label>a</label>
<p>Present affiliation: Centers for Disease Control and Prevention, Division of Healthcare Quality Promotion, Atlanta, GA.</p>
</fn>
<fn id="fn2"><label>b</label>
<p>Present affiliation: No longer employed by the Wisconsin Division of Public Health.</p>
</fn>
</author-notes>
<pub-date pub-type="ppub"><day>15</day>
<month>3</month>
<year>2011</year>
</pub-date>
<volume>203</volume>
<issue>6</issue>
<fpage>828</fpage>
<lpage>837</lpage>
<history><date date-type="received"><day>26</day>
<month>7</month>
<year>2010</year>
</date>
<date date-type="accepted"><day>26</day>
<month>10</month>
<year>2010</year>
</date>
</history>
<permissions><copyright-statement>© The Author 2011. Published by Oxford University Press on behalf of the Infectious Diseases Society of America. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com</copyright-statement>
<copyright-year>2011</copyright-year>
</permissions>
<abstract><p><bold><italic>Background.</italic>
</bold>
Wisconsin was severely affected by pandemic waves of 2009 influenza A H1N1 infection during the period 15 April through 30 August 2009 (wave 1) and 31 August 2009 through 2 January 2010 (wave 2).</p>
<p><bold><italic>Methods.</italic>
</bold>
To evaluate differences in epidemiologic features and outcomes during these pandemic waves, we examined prospective surveillance data on Wisconsin residents who were hospitalized ≥24 h with or died of pandemic H1N1 infection.</p>
<p><bold><italic>Results.</italic>
</bold>
Rates of hospitalizations and deaths from pandemic H1N1 infection in Wisconsin increased 4- and 5-fold, respectively, from wave 1 to wave 2; outside Milwaukee, hospitalization and death rates increased 10- and 8-fold, respectively. Hospitalization rates were highest among racial and ethnic minorities and children during wave 1 and increased most during wave 2 among non-Hispanic whites and adults. Times to hospital admission and antiviral treatment improved between waves, but the overall hospital course remained similar, with no change in hospitalization duration, intensive care unit admission, requirement for mechanical ventilation, or mortality.</p>
<p><bold><italic>Conclusions.</italic>
</bold>
We report broader geographic spread and marked demographic differences during pandemic wave 2, compared with wave 1, although clinical outcomes were similar. Our findings emphasize the importance of using comprehensive surveillance data to detect changing characteristics and impacts during an influenza pandemic and of vigorously promoting influenza vaccination and other prevention efforts.</p>
</abstract>
</article-meta>
</front>
</pmc>
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