Influenza activity 2000/2001.
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/1006 |
Resumo: | Influenza viral infections are an important cause of morbidity in all age groups and are associated with a high mortality rate amongst the elderly and in risk groups. The current study analyses data from the epidemiological surveillance of influenza during the 2000/2001-winter season. Clinical, epidemiological and virological data relative to cases of influenza syndrome were collected via the National Influenza Surveillance Scheme, in collaboration with the General Directory of Health and integrates the information obtained by the Network of Sentinel Medical Practitioners and Emergency Units. The data analysis hereby obtained shows a low influenza activity during the 2000/2001-winter season, with an epidemiological period characterized by small duration and intensity. The incidence rate of influenza-like illnesses increased above the base line during three weeks and didn't surpass 74 cases per 1,000,000 inhabitants. Influenza B viruses were predominant with the simultaneous presence of influenza A (H1 and H3). The antigenic and genetic characterisation of the isolates allowed the confirmation of the similarity between these viral strains and the vaccine strains as well as the extent of the antigenic drift. Despite the antigenic similarity between the majority of influenza B isolates and the vaccine strains it's noticeable that the genetic characteristics showed an evolution directed towards the B/Sichuan/379/99 strain, which would later be incorporated in the 2001/2002 influenza vaccine. The co-circulation of two different lineages was consequently observed by the phylogenetic analysis of the B strains isolated in our country. |
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Influenza activity 2000/2001.Actividade gripal em Portugal no inverno de 2000/2001: análise antigénica e genética das estirpes de vírus influenza.Influenza viral infections are an important cause of morbidity in all age groups and are associated with a high mortality rate amongst the elderly and in risk groups. The current study analyses data from the epidemiological surveillance of influenza during the 2000/2001-winter season. Clinical, epidemiological and virological data relative to cases of influenza syndrome were collected via the National Influenza Surveillance Scheme, in collaboration with the General Directory of Health and integrates the information obtained by the Network of Sentinel Medical Practitioners and Emergency Units. The data analysis hereby obtained shows a low influenza activity during the 2000/2001-winter season, with an epidemiological period characterized by small duration and intensity. The incidence rate of influenza-like illnesses increased above the base line during three weeks and didn't surpass 74 cases per 1,000,000 inhabitants. Influenza B viruses were predominant with the simultaneous presence of influenza A (H1 and H3). The antigenic and genetic characterisation of the isolates allowed the confirmation of the similarity between these viral strains and the vaccine strains as well as the extent of the antigenic drift. Despite the antigenic similarity between the majority of influenza B isolates and the vaccine strains it's noticeable that the genetic characteristics showed an evolution directed towards the B/Sichuan/379/99 strain, which would later be incorporated in the 2001/2002 influenza vaccine. The co-circulation of two different lineages was consequently observed by the phylogenetic analysis of the B strains isolated in our country.Influenza viral infections are an important cause of morbidity in all age groups and are associated with a high mortality rate amongst the elderly and in risk groups. The current study analyses data from the epidemiological surveillance of influenza during the 2000/2001-winter season. Clinical, epidemiological and virological data relative to cases of influenza syndrome were collected via the National Influenza Surveillance Scheme, in collaboration with the General Directory of Health and integrates the information obtained by the Network of Sentinel Medical Practitioners and Emergency Units. The data analysis hereby obtained shows a low influenza activity during the 2000/2001-winter season, with an epidemiological period characterized by small duration and intensity. The incidence rate of influenza-like illnesses increased above the base line during three weeks and didn't surpass 74 cases per 1,000,000 inhabitants. Influenza B viruses were predominant with the simultaneous presence of influenza A (H1 and H3). The antigenic and genetic characterisation of the isolates allowed the confirmation of the similarity between these viral strains and the vaccine strains as well as the extent of the antigenic drift. Despite the antigenic similarity between the majority of influenza B isolates and the vaccine strains it's noticeable that the genetic characteristics showed an evolution directed towards the B/Sichuan/379/99 strain, which would later be incorporated in the 2001/2002 influenza vaccine. The co-circulation of two different lineages was consequently observed by the phylogenetic analysis of the B strains isolated in our country.Ordem dos Médicos2005-02-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/1006oai:ojs.www.actamedicaportuguesa.com:article/1006Acta Médica Portuguesa; Vol. 18 No. 1 (2005): January-February; 19-25Acta Médica Portuguesa; Vol. 18 N.º 1 (2005): Janeiro-Fevereiro; 19-251646-07580870-399Xreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPporhttps://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/1006https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/1006/675Pechirra, PedroRebelo-de-Andrade, HelenaGuiomar, RaquelRibeiro, CarlosCoelho, AnabelaPedro, SóniaGeorge, Franciscoinfo:eu-repo/semantics/openAccess2022-12-20T10:57:18Zoai:ojs.www.actamedicaportuguesa.com:article/1006Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:16:54.280751Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Influenza activity 2000/2001. Actividade gripal em Portugal no inverno de 2000/2001: análise antigénica e genética das estirpes de vírus influenza. |
title |
Influenza activity 2000/2001. |
spellingShingle |
Influenza activity 2000/2001. Pechirra, Pedro |
title_short |
Influenza activity 2000/2001. |
title_full |
Influenza activity 2000/2001. |
title_fullStr |
Influenza activity 2000/2001. |
title_full_unstemmed |
Influenza activity 2000/2001. |
title_sort |
Influenza activity 2000/2001. |
author |
Pechirra, Pedro |
author_facet |
Pechirra, Pedro Rebelo-de-Andrade, Helena Guiomar, Raquel Ribeiro, Carlos Coelho, Anabela Pedro, Sónia George, Francisco |
author_role |
author |
author2 |
Rebelo-de-Andrade, Helena Guiomar, Raquel Ribeiro, Carlos Coelho, Anabela Pedro, Sónia George, Francisco |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Pechirra, Pedro Rebelo-de-Andrade, Helena Guiomar, Raquel Ribeiro, Carlos Coelho, Anabela Pedro, Sónia George, Francisco |
description |
Influenza viral infections are an important cause of morbidity in all age groups and are associated with a high mortality rate amongst the elderly and in risk groups. The current study analyses data from the epidemiological surveillance of influenza during the 2000/2001-winter season. Clinical, epidemiological and virological data relative to cases of influenza syndrome were collected via the National Influenza Surveillance Scheme, in collaboration with the General Directory of Health and integrates the information obtained by the Network of Sentinel Medical Practitioners and Emergency Units. The data analysis hereby obtained shows a low influenza activity during the 2000/2001-winter season, with an epidemiological period characterized by small duration and intensity. The incidence rate of influenza-like illnesses increased above the base line during three weeks and didn't surpass 74 cases per 1,000,000 inhabitants. Influenza B viruses were predominant with the simultaneous presence of influenza A (H1 and H3). The antigenic and genetic characterisation of the isolates allowed the confirmation of the similarity between these viral strains and the vaccine strains as well as the extent of the antigenic drift. Despite the antigenic similarity between the majority of influenza B isolates and the vaccine strains it's noticeable that the genetic characteristics showed an evolution directed towards the B/Sichuan/379/99 strain, which would later be incorporated in the 2001/2002 influenza vaccine. The co-circulation of two different lineages was consequently observed by the phylogenetic analysis of the B strains isolated in our country. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-02-28 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/1006 oai:ojs.www.actamedicaportuguesa.com:article/1006 |
url |
https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/1006 |
identifier_str_mv |
oai:ojs.www.actamedicaportuguesa.com:article/1006 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/1006 https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/1006/675 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
dc.publisher.none.fl_str_mv |
Ordem dos Médicos |
publisher.none.fl_str_mv |
Ordem dos Médicos |
dc.source.none.fl_str_mv |
Acta Médica Portuguesa; Vol. 18 No. 1 (2005): January-February; 19-25 Acta Médica Portuguesa; Vol. 18 N.º 1 (2005): Janeiro-Fevereiro; 19-25 1646-0758 0870-399X reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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