An analysis of 332 fatalities infected with pandemic 2009 influenza A (H1N1) in Argentina.

<h4>Background</h4>The apparent high number of deaths in Argentina during the 2009 pandemic led to concern that the influenza A H1N1pdm disease was different there. We report the characteristics and risk factors for influenza A H1N1pdm fatalities.<h4>Methods</h4>We identified...

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Autores principales: Ana M Balanzat, Christian Hertlein, Carlos Apezteguia, Pablo Bonvehi, Luis Cámera, Angela Gentile, Oscar Rizzo, Manuel Gómez-Carrillo, Fatima Coronado, Eduardo Azziz-Baumgartner, Pollyanna R Chávez, Marc-Alain Widdowson
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Publicado: Public Library of Science (PLoS) 2012
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spelling oai:doaj.org-article:1789a14ffe5f4da29b4e7816e652b0622021-11-18T07:22:50ZAn analysis of 332 fatalities infected with pandemic 2009 influenza A (H1N1) in Argentina.1932-620310.1371/journal.pone.0033670https://doaj.org/article/1789a14ffe5f4da29b4e7816e652b0622012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22506006/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>The apparent high number of deaths in Argentina during the 2009 pandemic led to concern that the influenza A H1N1pdm disease was different there. We report the characteristics and risk factors for influenza A H1N1pdm fatalities.<h4>Methods</h4>We identified laboratory-confirmed influenza A H1N1pdm fatalities occurring during June-July 2009. Physicians abstracted data on age, sex, time of onset of illness, medical history, clinical presentation at admission, laboratory, treatment, and outcomes using standardize questionnaires. We explored the characteristics of fatalities according to their age and risk group.<h4>Results</h4>Of 332 influenza A H1N1pdm fatalities, 226 (68%) were among persons aged <50 years. Acute respiratory failure was the leading cause of death. Of all cases, 249 (75%) had at least one comorbidity as defined by Advisory Committee on Immunization Practices. Obesity was reported in 32% with data and chronic pulmonary disease in 28%. Among the 40 deaths in children aged <5 years, chronic pulmonary disease (42%) and neonatal pathologies (35%) were the most common co-morbidities. Twenty (6%) fatalities were among pregnant or postpartum women of which only 47% had diagnosed co-morbidities. Only 13% of patients received antiviral treatment within 48 hours of symptom onset. None of children aged <5 years or the pregnant women received antivirals within 48 h of symptom onset. As the pandemic progressed, the time from symptom-onset to medical care and to antiviral treatment decreased significantly among case-patients who subsequently died (p<0.001).<h4>Conclusion</h4>Persons with co-morbidities, pregnant and who received antivirals late were over-represented among influenza A H1N1pdm deaths in Argentina, though timeliness of antiviral treatment improved during the pandemic.Ana M BalanzatChristian HertleinCarlos ApezteguiaPablo BonvehiLuis CámeraAngela GentileOscar RizzoManuel Gómez-CarrilloFatima CoronadoEduardo Azziz-BaumgartnerPollyanna R ChávezMarc-Alain WiddowsonPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 4, p e33670 (2012)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Ana M Balanzat
Christian Hertlein
Carlos Apezteguia
Pablo Bonvehi
Luis Cámera
Angela Gentile
Oscar Rizzo
Manuel Gómez-Carrillo
Fatima Coronado
Eduardo Azziz-Baumgartner
Pollyanna R Chávez
Marc-Alain Widdowson
An analysis of 332 fatalities infected with pandemic 2009 influenza A (H1N1) in Argentina.
description <h4>Background</h4>The apparent high number of deaths in Argentina during the 2009 pandemic led to concern that the influenza A H1N1pdm disease was different there. We report the characteristics and risk factors for influenza A H1N1pdm fatalities.<h4>Methods</h4>We identified laboratory-confirmed influenza A H1N1pdm fatalities occurring during June-July 2009. Physicians abstracted data on age, sex, time of onset of illness, medical history, clinical presentation at admission, laboratory, treatment, and outcomes using standardize questionnaires. We explored the characteristics of fatalities according to their age and risk group.<h4>Results</h4>Of 332 influenza A H1N1pdm fatalities, 226 (68%) were among persons aged <50 years. Acute respiratory failure was the leading cause of death. Of all cases, 249 (75%) had at least one comorbidity as defined by Advisory Committee on Immunization Practices. Obesity was reported in 32% with data and chronic pulmonary disease in 28%. Among the 40 deaths in children aged <5 years, chronic pulmonary disease (42%) and neonatal pathologies (35%) were the most common co-morbidities. Twenty (6%) fatalities were among pregnant or postpartum women of which only 47% had diagnosed co-morbidities. Only 13% of patients received antiviral treatment within 48 hours of symptom onset. None of children aged <5 years or the pregnant women received antivirals within 48 h of symptom onset. As the pandemic progressed, the time from symptom-onset to medical care and to antiviral treatment decreased significantly among case-patients who subsequently died (p<0.001).<h4>Conclusion</h4>Persons with co-morbidities, pregnant and who received antivirals late were over-represented among influenza A H1N1pdm deaths in Argentina, though timeliness of antiviral treatment improved during the pandemic.
format article
author Ana M Balanzat
Christian Hertlein
Carlos Apezteguia
Pablo Bonvehi
Luis Cámera
Angela Gentile
Oscar Rizzo
Manuel Gómez-Carrillo
Fatima Coronado
Eduardo Azziz-Baumgartner
Pollyanna R Chávez
Marc-Alain Widdowson
author_facet Ana M Balanzat
Christian Hertlein
Carlos Apezteguia
Pablo Bonvehi
Luis Cámera
Angela Gentile
Oscar Rizzo
Manuel Gómez-Carrillo
Fatima Coronado
Eduardo Azziz-Baumgartner
Pollyanna R Chávez
Marc-Alain Widdowson
author_sort Ana M Balanzat
title An analysis of 332 fatalities infected with pandemic 2009 influenza A (H1N1) in Argentina.
title_short An analysis of 332 fatalities infected with pandemic 2009 influenza A (H1N1) in Argentina.
title_full An analysis of 332 fatalities infected with pandemic 2009 influenza A (H1N1) in Argentina.
title_fullStr An analysis of 332 fatalities infected with pandemic 2009 influenza A (H1N1) in Argentina.
title_full_unstemmed An analysis of 332 fatalities infected with pandemic 2009 influenza A (H1N1) in Argentina.
title_sort analysis of 332 fatalities infected with pandemic 2009 influenza a (h1n1) in argentina.
publisher Public Library of Science (PLoS)
publishDate 2012
url https://doaj.org/article/1789a14ffe5f4da29b4e7816e652b062
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