Estimating the disease burden of pandemic (H1N1) 2009 virus infection in Hunter New England, Northern New South Wales, Australia, 2009.

Estimating the disease burden of pandemic (H1N1) 2009 virus infection in Hunter New England, Northern New South Wales, Australia, 2009.

<h4>Introduction</h4>On May 26, 2009, the first confirmed case of Pandemic (H1N1) 2009 virus (pH1N1) infection in Hunter New England (HNE), New South Wales (NSW), Australia (population 866,000) was identified. We used local surveillance data to estimate pH1N1-associated disease burden du...

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Autores principales: Fatimah S Dawood, Kirsty G Hope, David N Durrheim, Rodney Givney, Alicia M Fry, Craig B Dalton
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Publicado: Public Library of Science (PLoS) 2010
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spelling oai:doaj.org-article:a3e12c4192a44fedacb6a0fc10eefe2c2021-11-25T06:25:04ZEstimating the disease burden of pandemic (H1N1) 2009 virus infection in Hunter New England, Northern New South Wales, Australia, 2009.1932-620310.1371/journal.pone.0009880https://doaj.org/article/a3e12c4192a44fedacb6a0fc10eefe2c2010-03-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/20360868/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Introduction</h4>On May 26, 2009, the first confirmed case of Pandemic (H1N1) 2009 virus (pH1N1) infection in Hunter New England (HNE), New South Wales (NSW), Australia (population 866,000) was identified. We used local surveillance data to estimate pH1N1-associated disease burden during the first wave of pH1N1 circulation in HNE.<h4>Methods</h4>Surveillance was established during June 1-August 30, 2009, for: 1) laboratory detection of pH1N1 at HNE and NSW laboratories, 2) pH1N1 community influenza-like illness (ILI) using an internet survey of HNE residents, and 3) pH1N1-associated hospitalizations and deaths using respiratory illness International Classification of Diseases 10 codes at 35 HNE hospitals and mandatory reporting of confirmed pH1N1-associated hospitalizations and deaths to the public health service. The proportion of pH1N1 positive specimens was applied to estimates of ILI, hospitalizations, and deaths to estimate disease burden.<h4>Results</h4>Of 34,177 specimens tested at NSW laboratories, 4,094 (12%) were pH1N1 positive. Of 1,881 specimens from patients evaluated in emergency departments and/or hospitalized, 524 (26%) were pH1N1 positive. The estimated number of persons with pH1N1-associated ILI in the HNE region was 53,383 (range 37,828-70,597) suggesting a 6.2% attack rate (range 4.4-8.2%). An estimated 509 pH1N1-associated hospitalizations (range 388-630) occurred (reported: 184), and up to 10 pH1N1-associated deaths (range 8-13) occurred (reported: 5). The estimated case hospitalization ratio was 1% and case fatality ratio was 0.02%.<h4>Discussion</h4>The first wave of pH1N1 activity in HNE resulted in symptomatic infection in a small proportion of the population, and the number of HNE pH1N1-associated hospitalizations and deaths is likely higher than officially reported.Fatimah S DawoodKirsty G HopeDavid N DurrheimRodney GivneyAlicia M FryCraig B DaltonPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 5, Iss 3, p e9880 (2010)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Fatimah S Dawood
Kirsty G Hope
David N Durrheim
Rodney Givney
Alicia M Fry
Craig B Dalton
Estimating the disease burden of pandemic (H1N1) 2009 virus infection in Hunter New England, Northern New South Wales, Australia, 2009.
description <h4>Introduction</h4>On May 26, 2009, the first confirmed case of Pandemic (H1N1) 2009 virus (pH1N1) infection in Hunter New England (HNE), New South Wales (NSW), Australia (population 866,000) was identified. We used local surveillance data to estimate pH1N1-associated disease burden during the first wave of pH1N1 circulation in HNE.<h4>Methods</h4>Surveillance was established during June 1-August 30, 2009, for: 1) laboratory detection of pH1N1 at HNE and NSW laboratories, 2) pH1N1 community influenza-like illness (ILI) using an internet survey of HNE residents, and 3) pH1N1-associated hospitalizations and deaths using respiratory illness International Classification of Diseases 10 codes at 35 HNE hospitals and mandatory reporting of confirmed pH1N1-associated hospitalizations and deaths to the public health service. The proportion of pH1N1 positive specimens was applied to estimates of ILI, hospitalizations, and deaths to estimate disease burden.<h4>Results</h4>Of 34,177 specimens tested at NSW laboratories, 4,094 (12%) were pH1N1 positive. Of 1,881 specimens from patients evaluated in emergency departments and/or hospitalized, 524 (26%) were pH1N1 positive. The estimated number of persons with pH1N1-associated ILI in the HNE region was 53,383 (range 37,828-70,597) suggesting a 6.2% attack rate (range 4.4-8.2%). An estimated 509 pH1N1-associated hospitalizations (range 388-630) occurred (reported: 184), and up to 10 pH1N1-associated deaths (range 8-13) occurred (reported: 5). The estimated case hospitalization ratio was 1% and case fatality ratio was 0.02%.<h4>Discussion</h4>The first wave of pH1N1 activity in HNE resulted in symptomatic infection in a small proportion of the population, and the number of HNE pH1N1-associated hospitalizations and deaths is likely higher than officially reported.
format article
author Fatimah S Dawood
Kirsty G Hope
David N Durrheim
Rodney Givney
Alicia M Fry
Craig B Dalton
author_facet Fatimah S Dawood
Kirsty G Hope
David N Durrheim
Rodney Givney
Alicia M Fry
Craig B Dalton
author_sort Fatimah S Dawood
title Estimating the disease burden of pandemic (H1N1) 2009 virus infection in Hunter New England, Northern New South Wales, Australia, 2009.
title_short Estimating the disease burden of pandemic (H1N1) 2009 virus infection in Hunter New England, Northern New South Wales, Australia, 2009.
title_full Estimating the disease burden of pandemic (H1N1) 2009 virus infection in Hunter New England, Northern New South Wales, Australia, 2009.
title_fullStr Estimating the disease burden of pandemic (H1N1) 2009 virus infection in Hunter New England, Northern New South Wales, Australia, 2009.
title_full_unstemmed Estimating the disease burden of pandemic (H1N1) 2009 virus infection in Hunter New England, Northern New South Wales, Australia, 2009.
title_sort estimating the disease burden of pandemic (h1n1) 2009 virus infection in hunter new england, northern new south wales, australia, 2009.
publisher Public Library of Science (PLoS)
publishDate 2010
url https://doaj.org/article/a3e12c4192a44fedacb6a0fc10eefe2c
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