Epidemiological aspects of influenza A related to climatic conditions during and after a pandemic period in the city of Salvador, northeastern Brazil
During the influenza pandemic of 2009, the A(H1N1)pdm09, A/H3N2 seasonal and influenza B viruses were observed to be co-circulating with other respiratory viruses. To observe the epidemiological pattern of the influenza virus between May 2009-August 2011, 467 nasopharyngeal aspirates were collected...
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Instituto Oswaldo Cruz, Ministério da Saúde
2014-04-01
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doaj-091ed3ae0f374bcb887a91753449db8a2020-11-24T21:37:55ZengInstituto Oswaldo Cruz, Ministério da SaúdeMemórias do Instituto Oswaldo Cruz.1678-80602014-04-01109222923510.1590/0074-0276140273S0074-02762014000200229Epidemiological aspects of influenza A related to climatic conditions during and after a pandemic period in the city of Salvador, northeastern BrazilRosangela de Castro SilvaMarilda Agudo Mendonça SiqueiraEduardo Martins NettoJacione Silva BastosCristiana Maria Nascimento-CarvalhoAna Luisa Vilas-BoasMaiara Lana BouzasFernando do Couto MottaCarlos BritesDuring the influenza pandemic of 2009, the A(H1N1)pdm09, A/H3N2 seasonal and influenza B viruses were observed to be co-circulating with other respiratory viruses. To observe the epidemiological pattern of the influenza virus between May 2009-August 2011, 467 nasopharyngeal aspirates were collected from children less than five years of age in the city of Salvador. In addition, data on weather conditions were obtained. Indirect immunofluorescence, real-time transcription reverse polymerase chain reaction (RT-PCR), and sequencing assays were performed for influenza virus detection. Of all 467 samples, 34 (7%) specimens were positive for influenza A and of these, viral characterisation identified Flu A/H3N2 in 25/34 (74%) and A(H1N1)pdm09 in 9/34 (26%). Influenza B accounted for a small proportion (0.8%) and the other respiratory viruses for 27.2% (127/467). No deaths were registered and no pattern of seasonality or expected climatic conditions could be established. These observations are important for predicting the evolution of epidemics and in implementing future anti-pandemic measures.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762014000200229&lng=en&tlng=eninfluenzaA(H1N1)pdm09childrenepidemiologyseasonalityclimate |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Rosangela de Castro Silva Marilda Agudo Mendonça Siqueira Eduardo Martins Netto Jacione Silva Bastos Cristiana Maria Nascimento-Carvalho Ana Luisa Vilas-Boas Maiara Lana Bouzas Fernando do Couto Motta Carlos Brites |
spellingShingle |
Rosangela de Castro Silva Marilda Agudo Mendonça Siqueira Eduardo Martins Netto Jacione Silva Bastos Cristiana Maria Nascimento-Carvalho Ana Luisa Vilas-Boas Maiara Lana Bouzas Fernando do Couto Motta Carlos Brites Epidemiological aspects of influenza A related to climatic conditions during and after a pandemic period in the city of Salvador, northeastern Brazil Memórias do Instituto Oswaldo Cruz. influenza A(H1N1)pdm09 children epidemiology seasonality climate |
author_facet |
Rosangela de Castro Silva Marilda Agudo Mendonça Siqueira Eduardo Martins Netto Jacione Silva Bastos Cristiana Maria Nascimento-Carvalho Ana Luisa Vilas-Boas Maiara Lana Bouzas Fernando do Couto Motta Carlos Brites |
author_sort |
Rosangela de Castro Silva |
title |
Epidemiological aspects of influenza A related to climatic conditions during and after a pandemic period in the city of Salvador, northeastern Brazil |
title_short |
Epidemiological aspects of influenza A related to climatic conditions during and after a pandemic period in the city of Salvador, northeastern Brazil |
title_full |
Epidemiological aspects of influenza A related to climatic conditions during and after a pandemic period in the city of Salvador, northeastern Brazil |
title_fullStr |
Epidemiological aspects of influenza A related to climatic conditions during and after a pandemic period in the city of Salvador, northeastern Brazil |
title_full_unstemmed |
Epidemiological aspects of influenza A related to climatic conditions during and after a pandemic period in the city of Salvador, northeastern Brazil |
title_sort |
epidemiological aspects of influenza a related to climatic conditions during and after a pandemic period in the city of salvador, northeastern brazil |
publisher |
Instituto Oswaldo Cruz, Ministério da Saúde |
series |
Memórias do Instituto Oswaldo Cruz. |
issn |
1678-8060 |
publishDate |
2014-04-01 |
description |
During the influenza pandemic of 2009, the A(H1N1)pdm09, A/H3N2 seasonal and influenza B viruses were observed to be co-circulating with other respiratory viruses. To observe the epidemiological pattern of the influenza virus between May 2009-August 2011, 467 nasopharyngeal aspirates were collected from children less than five years of age in the city of Salvador. In addition, data on weather conditions were obtained. Indirect immunofluorescence, real-time transcription reverse polymerase chain reaction (RT-PCR), and sequencing assays were performed for influenza virus detection. Of all 467 samples, 34 (7%) specimens were positive for influenza A and of these, viral characterisation identified Flu A/H3N2 in 25/34 (74%) and A(H1N1)pdm09 in 9/34 (26%). Influenza B accounted for a small proportion (0.8%) and the other respiratory viruses for 27.2% (127/467). No deaths were registered and no pattern of seasonality or expected climatic conditions could be established. These observations are important for predicting the evolution of epidemics and in implementing future anti-pandemic measures. |
topic |
influenza A(H1N1)pdm09 children epidemiology seasonality climate |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762014000200229&lng=en&tlng=en |
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