A DESCRIPTIVE STUDY OF PANDEMIC INFLUENZA A(H1N1)PDM09 IN BRAZIL, 2009-2010

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dc.contributor Sistema FMUSP-HC: Faculdade de Medicina da Universidade de São Paulo (FMUSP) e Hospital das Clínicas da FMUSP
dc.contributor.author ROSSETTO, Erika Valeska FMUSP-HC
LUNA, Expedito Jose de Albuquerque FMUSP-HC
dc.date.issued 2016
dc.identifier.citation REVISTA DO INSTITUTO DE MEDICINA TROPICAL DE SAO PAULO, v.58, article ID UNSP 78, 8p, 2016
dc.identifier.issn 0036-4665
dc.identifier.uri http://observatorio.fm.usp.br/handle/OPI/20397
dc.description.abstract Influenza A viruses undergo frequent antigenic mutations and may thus cause seasonal epidemics and pandemics. The aim of this study was to recover the epidemiological history of the pandemic influenza A(H1N1) pdm09 in Brazil. A descriptive study was conducted in 2009-2010. The Brazilian Information System for reportable diseases (SINAN) was the data source. A total of 105,054 suspected cases of influenza A(H1N1) pdm09 were reported to SINAN. Of these, 53,797 (51.2%) were classified as the new influenza virus subtype. Among the confirmed cases, 56.7% were female, the mean age was 26.31 (SD +/- 18.1) years. Fever was the most common sign among the confirmed cases (99.7%) and the presence of comorbidities was reported in 32.5% of cases. In 2009 there were confirmed cases in all 26 Brazilian States and the Federal District. The incidence (per 100,000 inhabitants) of severe influenza in the population was 28.0 in 2009 and 0.5 in 2010. The states of Parana (301.3), Santa Catarina (36.0) and Rio Grande do Sul (27.4) presented the highest incidence; 46.4% of the confirmed cases were hospitalized and 47,643 were cured (93.8%). The case-fatality rate was 3.9% in 2009. The pandemic virus A(H1N1)pdm09 hit Brazil between April/2009 and December/2010 with an important difference in the geographic pattern distribution of the cases from the northeast to the south of the country. Children and young adults were the most affected. The limitations of the study were data quality and inconsistencies in the final classification of cases in SINAN. This study highlights the urgent need for improvements in the surveillance of emerging diseases in Brazil.
dc.language.iso eng
dc.publisher INST MEDICINA TROPICAL SAO PAULO
dc.relation.ispartof Revista do Instituto de Medicina Tropical de Sao Paulo
dc.rights openAccess
dc.subject Influenza; Epidemiological surveillance; Information system; Disease outbreaks; Brazil
dc.subject.other a h1n1 2009; sao-paulo; hospitalized-patients; infection; virus; outcomes; wave
dc.title A DESCRIPTIVE STUDY OF PANDEMIC INFLUENZA A(H1N1)PDM09 IN BRAZIL, 2009-2010
dc.type article
dc.rights.holder Copyright INST MEDICINA TROPICAL SAO PAULO
dc.description.group LIM/52
dc.identifier.doi 10.1590/S1678-9946201658078
dc.identifier.pmid 27828619
dc.type.category original article
dc.type.version publishedVersion
hcfmusp.author ROSSETTO, Erika Valeska:IMT:
hcfmusp.author LUNA, Expedito Jose de Albuquerque:IMT:IMT
hcfmusp.origem.id WOS:000396241000029
hcfmusp.origem.id 2-s2.0-85014823634
hcfmusp.origem.id SCIELO:S0036-46652016005000260
hcfmusp.publisher.city SAO PAULO
hcfmusp.publisher.country BRAZIL
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dc.description.index MEDLINE
dc.identifier.eissn 1678-9946
hcfmusp.citation.scopus 1
hcfmusp.citation.wos 0


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