Use of national pneumonia surveillance to describe influenza A(H7N9) virus epidemiology, China, 2004-2013.
Emerg Infect Dis
; 19(11): 1784-90, 2013 Nov.
Article
em En
| MEDLINE
| ID: mdl-24206646
In mainland China, most avian influenza A(H7N9) cases in the spring of 2013 were reported through the pneumonia of unknown etiology (PUE) surveillance system. To understand the role of possible underreporting and surveillance bias in assessing the epidemiology of subtype H7N9 cases and the effect of live-poultry market closures, we examined all PUE cases reported from 2004 through May 3, 2013. Historically, the PUE system was underused, reporting was inconsistent, and PUE reporting was biased toward A(H7N9)-affected provinces, with sparse data from unaffected provinces; however, we found no evidence that the older ages of persons with A(H7N9) resulted from surveillance bias. The absolute number and the proportion of PUE cases confirmed to be A(H7N9) declined after live-poultry market closures (p<0.001), indicating that market closures might have positively affected outbreak control. In China, PUE surveillance needs to be improved.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Influenza Humana
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Subtipo H7N9 do Vírus da Influenza A
Tipo de estudo:
Etiology_studies
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Screening_studies
Limite:
Adolescent
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Adult
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Aged
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Animals
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
País/Região como assunto:
Asia
Idioma:
En
Revista:
Emerg Infect Dis
Assunto da revista:
DOENCAS TRANSMISSIVEIS
Ano de publicação:
2013
Tipo de documento:
Article