Household transmission of influenza A(H1N1)pdm09 in the pandemic and post-pandemic seasons.
Identifieur interne : 000220 ( Main/Exploration ); précédent : 000219; suivant : 000221Household transmission of influenza A(H1N1)pdm09 in the pandemic and post-pandemic seasons.
Auteurs : Itziar Casado [Espagne] ; Iván Martínez-Baz [Espagne] ; Rosana Burgui [Espagne] ; Fátima Irisarri [Espagne] ; Maite Arriazu [Espagne] ; Fernando Elía [Espagne] ; Ana Navascués [Espagne] ; Carmen Ezpeleta [Espagne] ; Pablo Aldaz [Espagne] ; Jesús Castilla [Espagne]Source :
- PloS one [ 1932-6203 ] ; 2014.
Descripteurs français
- KwdFr :
- Adolescent (MeSH), Adulte (MeSH), Adulte d'âge moyen (MeSH), Caractéristiques familiales (MeSH), Enfant (MeSH), Enfant d'âge préscolaire (MeSH), Espagne (épidémiologie), Facteurs de risque (MeSH), Femelle (MeSH), Grippe humaine (transmission), Grippe humaine (épidémiologie), Humains (MeSH), Incidence (MeSH), Jeune adulte (MeSH), Mâle (MeSH), Nourrisson (MeSH), Nouveau-né (MeSH), Saisons (MeSH), Sous-type H1N1 du virus de la grippe A (MeSH), Surveillance de la population (MeSH).
- MESH :
- épidémiologie : Espagne, Grippe humaine.
- Adolescent, Adulte, Adulte d'âge moyen, Caractéristiques familiales, Enfant, Enfant d'âge préscolaire, Facteurs de risque, Femelle, Humains, Incidence, Jeune adulte, Mâle, Nourrisson, Nouveau-né, Saisons, Sous-type H1N1 du virus de la grippe A, Surveillance de la population.
- Wicri :
- geographic : Espagne.
English descriptors
- KwdEn :
- Adolescent (MeSH), Adult (MeSH), Child (MeSH), Child, Preschool (MeSH), Family Characteristics (MeSH), Female (MeSH), Humans (MeSH), Incidence (MeSH), Infant (MeSH), Infant, Newborn (MeSH), Influenza A Virus, H1N1 Subtype (MeSH), Influenza, Human (epidemiology), Influenza, Human (transmission), Male (MeSH), Middle Aged (MeSH), Population Surveillance (MeSH), Risk Factors (MeSH), Seasons (MeSH), Spain (epidemiology), Young Adult (MeSH).
- MESH :
- geographic , epidemiology : Spain.
- epidemiology : Influenza, Human.
- transmission : Influenza, Human.
- Adolescent, Adult, Child, Child, Preschool, Family Characteristics, Female, Humans, Incidence, Infant, Infant, Newborn, Influenza A Virus, H1N1 Subtype, Male, Middle Aged, Population Surveillance, Risk Factors, Seasons, Young Adult.
Abstract
BACKGROUND
The transmission of influenza viruses occurs person to person and is facilitated by contacts within enclosed environments such as households. The aim of this study was to evaluate secondary attack rates and factors associated with household transmission of laboratory-confirmed influenza A(H1N1)pdm09 in the pandemic and post-pandemic seasons.
METHODS
During the 2009-2010 and 2010-2011 influenza seasons, 76 sentinel physicians in Navarra, Spain, took nasopharyngeal and pharyngeal swabs from patients diagnosed with influenza-like illness. A trained nurse telephoned households of those patients who were laboratory-confirmed for influenza A(H1N1)pdm09 to ask about the symptoms, risk factors and vaccination status of each household member.
RESULTS
In the 405 households with a patient laboratory-confirmed for influenza A(H1N1)pdm09, 977 susceptible contacts were identified; 16% of them (95% CI 14-19%) presented influenza-like illness and were considered as secondary cases. The secondary attack rate was 14% in 2009-2010 and 19% in the 2010-2011 season (p=0.049), an increase that mainly affected persons with major chronic conditions. In the multivariate logistic regression analysis, the risk of being a secondary case was higher in the 2010-2011 season than in the 2009-2010 season (adjusted odds ratio: 1.72; 95% CI 1.17-2.54), and in children under 5 years, with a decreasing risk in older contacts. Influenza vaccination was associated with lesser incidence of influenza-like illness near to statistical significance (adjusted odds ratio: 0.29; 95% CI 0.08-1.03).
CONCLUSION
The secondary attack rate in households was higher in the second season than in the first pandemic season. Children had a greater risk of infection. Preventive measures should be maintained in the second pandemic season, especially in high-risk persons.
DOI: 10.1371/journal.pone.0108485
PubMed: 25254376
PubMed Central: PMC4177918
Affiliations:
Links toward previous steps (curation, corpus...)
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Instituto de Salud Pública de Navarra, Pamplona, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Complejo Hospitalario de Navarra, Pamplona, Spain; Instituto de Salud Pública de Navarra, Pamplona</wicri:regionArea><wicri:noRegion>Pamplona</wicri:noRegion></affiliation></author><author><name sortKey="Martinez Baz, Ivan" sort="Martinez Baz, Ivan" uniqKey="Martinez Baz I" first="Iván" last="Martínez-Baz">Iván Martínez-Baz</name><affiliation wicri:level="3"><nlm:affiliation>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid</wicri:regionArea><placeName><settlement type="city">Madrid</settlement><region nuts="2" type="region">Communauté de Madrid</region></placeName></affiliation></author><author><name sortKey="Burgui, Rosana" sort="Burgui, Rosana" uniqKey="Burgui R" first="Rosana" last="Burgui">Rosana Burgui</name><affiliation wicri:level="3"><nlm:affiliation>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid</wicri:regionArea><placeName><settlement type="city">Madrid</settlement><region nuts="2" type="region">Communauté de Madrid</region></placeName></affiliation></author><author><name sortKey="Irisarri, Fatima" sort="Irisarri, Fatima" uniqKey="Irisarri F" first="Fátima" last="Irisarri">Fátima Irisarri</name><affiliation wicri:level="3"><nlm:affiliation>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid</wicri:regionArea><placeName><settlement type="city">Madrid</settlement><region nuts="2" type="region">Communauté de Madrid</region></placeName></affiliation></author><author><name sortKey="Arriazu, Maite" sort="Arriazu, Maite" uniqKey="Arriazu M" first="Maite" last="Arriazu">Maite Arriazu</name><affiliation wicri:level="3"><nlm:affiliation>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid</wicri:regionArea><placeName><settlement type="city">Madrid</settlement><region nuts="2" type="region">Communauté de Madrid</region></placeName></affiliation></author><author><name sortKey="Elia, Fernando" sort="Elia, Fernando" uniqKey="Elia F" first="Fernando" last="Elía">Fernando Elía</name><affiliation wicri:level="1"><nlm:affiliation>Dirección de Atención Primaria, Servicio Navarro de Salud, Pamplona, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Dirección de Atención Primaria, Servicio Navarro de Salud, Pamplona</wicri:regionArea><wicri:noRegion>Pamplona</wicri:noRegion></affiliation></author><author><name sortKey="Navascues, Ana" sort="Navascues, Ana" uniqKey="Navascues A" first="Ana" last="Navascués">Ana Navascués</name><affiliation wicri:level="1"><nlm:affiliation>Complejo Hospitalario de Navarra, Pamplona, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Complejo Hospitalario de Navarra, Pamplona</wicri:regionArea><wicri:noRegion>Pamplona</wicri:noRegion></affiliation></author><author><name sortKey="Ezpeleta, Carmen" sort="Ezpeleta, Carmen" uniqKey="Ezpeleta C" first="Carmen" last="Ezpeleta">Carmen Ezpeleta</name><affiliation wicri:level="1"><nlm:affiliation>Complejo Hospitalario de Navarra, Pamplona, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Complejo Hospitalario de Navarra, Pamplona</wicri:regionArea><wicri:noRegion>Pamplona</wicri:noRegion></affiliation></author><author><name sortKey="Aldaz, Pablo" sort="Aldaz, Pablo" uniqKey="Aldaz P" first="Pablo" last="Aldaz">Pablo Aldaz</name><affiliation wicri:level="1"><nlm:affiliation>Centro de Salud de San Juan, Servicio Navarro de Salud, Pamplona, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Centro de Salud de San Juan, Servicio Navarro de Salud, Pamplona</wicri:regionArea><wicri:noRegion>Pamplona</wicri:noRegion></affiliation></author><author><name sortKey="Castilla, Jesus" sort="Castilla, Jesus" uniqKey="Castilla J" first="Jesús" last="Castilla">Jesús Castilla</name><affiliation wicri:level="3"><nlm:affiliation>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid</wicri:regionArea><placeName><settlement type="city">Madrid</settlement><region nuts="2" type="region">Communauté de Madrid</region></placeName></affiliation></author></analytic><series><title level="j">PloS one</title><idno type="eISSN">1932-6203</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adolescent (MeSH)</term><term>Adult (MeSH)</term><term>Child (MeSH)</term><term>Child, Preschool (MeSH)</term><term>Family Characteristics (MeSH)</term><term>Female (MeSH)</term><term>Humans (MeSH)</term><term>Incidence (MeSH)</term><term>Infant (MeSH)</term><term>Infant, Newborn (MeSH)</term><term>Influenza A Virus, H1N1 Subtype (MeSH)</term><term>Influenza, Human (epidemiology)</term><term>Influenza, Human (transmission)</term><term>Male (MeSH)</term><term>Middle Aged (MeSH)</term><term>Population Surveillance (MeSH)</term><term>Risk Factors (MeSH)</term><term>Seasons (MeSH)</term><term>Spain (epidemiology)</term><term>Young Adult (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adolescent (MeSH)</term><term>Adulte (MeSH)</term><term>Adulte d'âge moyen (MeSH)</term><term>Caractéristiques familiales (MeSH)</term><term>Enfant (MeSH)</term><term>Enfant d'âge préscolaire (MeSH)</term><term>Espagne (épidémiologie)</term><term>Facteurs de risque (MeSH)</term><term>Femelle (MeSH)</term><term>Grippe humaine (transmission)</term><term>Grippe humaine (épidémiologie)</term><term>Humains (MeSH)</term><term>Incidence (MeSH)</term><term>Jeune adulte (MeSH)</term><term>Mâle (MeSH)</term><term>Nourrisson (MeSH)</term><term>Nouveau-né (MeSH)</term><term>Saisons (MeSH)</term><term>Sous-type H1N1 du virus de la grippe A (MeSH)</term><term>Surveillance de la population (MeSH)</term></keywords><keywords scheme="MESH" type="geographic" qualifier="epidemiology" xml:lang="en"><term>Spain</term></keywords><keywords scheme="MESH" qualifier="epidemiology" xml:lang="en"><term>Influenza, Human</term></keywords><keywords scheme="MESH" qualifier="transmission" xml:lang="en"><term>Influenza, Human</term></keywords><keywords scheme="MESH" qualifier="épidémiologie" xml:lang="fr"><term>Espagne</term><term>Grippe humaine</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adolescent</term><term>Adult</term><term>Child</term><term>Child, Preschool</term><term>Family Characteristics</term><term>Female</term><term>Humans</term><term>Incidence</term><term>Infant</term><term>Infant, Newborn</term><term>Influenza A Virus, H1N1 Subtype</term><term>Male</term><term>Middle Aged</term><term>Population Surveillance</term><term>Risk Factors</term><term>Seasons</term><term>Young Adult</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Adolescent</term><term>Adulte</term><term>Adulte d'âge moyen</term><term>Caractéristiques familiales</term><term>Enfant</term><term>Enfant d'âge préscolaire</term><term>Facteurs de risque</term><term>Femelle</term><term>Humains</term><term>Incidence</term><term>Jeune adulte</term><term>Mâle</term><term>Nourrisson</term><term>Nouveau-né</term><term>Saisons</term><term>Sous-type H1N1 du virus de la grippe A</term><term>Surveillance de la population</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Espagne</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p><b>BACKGROUND</b></p><p>The transmission of influenza viruses occurs person to person and is facilitated by contacts within enclosed environments such as households. The aim of this study was to evaluate secondary attack rates and factors associated with household transmission of laboratory-confirmed influenza A(H1N1)pdm09 in the pandemic and post-pandemic seasons.</p></div><div type="abstract" xml:lang="en"><p><b>METHODS</b></p><p>During the 2009-2010 and 2010-2011 influenza seasons, 76 sentinel physicians in Navarra, Spain, took nasopharyngeal and pharyngeal swabs from patients diagnosed with influenza-like illness. A trained nurse telephoned households of those patients who were laboratory-confirmed for influenza A(H1N1)pdm09 to ask about the symptoms, risk factors and vaccination status of each household member.</p></div><div type="abstract" xml:lang="en"><p><b>RESULTS</b></p><p>In the 405 households with a patient laboratory-confirmed for influenza A(H1N1)pdm09, 977 susceptible contacts were identified; 16% of them (95% CI 14-19%) presented influenza-like illness and were considered as secondary cases. The secondary attack rate was 14% in 2009-2010 and 19% in the 2010-2011 season (p=0.049), an increase that mainly affected persons with major chronic conditions. In the multivariate logistic regression analysis, the risk of being a secondary case was higher in the 2010-2011 season than in the 2009-2010 season (adjusted odds ratio: 1.72; 95% CI 1.17-2.54), and in children under 5 years, with a decreasing risk in older contacts. Influenza vaccination was associated with lesser incidence of influenza-like illness near to statistical significance (adjusted odds ratio: 0.29; 95% CI 0.08-1.03).</p></div><div type="abstract" xml:lang="en"><p><b>CONCLUSION</b></p><p>The secondary attack rate in households was higher in the second season than in the first pandemic season. Children had a greater risk of infection. Preventive measures should be maintained in the second pandemic season, especially in high-risk persons.</p></div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">25254376</PMID><DateCompleted><Year>2015</Year><Month>12</Month><Day>01</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Electronic-eCollection"><Journal><ISSN IssnType="Electronic">1932-6203</ISSN><JournalIssue CitedMedium="Internet"><Volume>9</Volume><Issue>9</Issue><PubDate><Year>2014</Year></PubDate></JournalIssue><Title>PloS one</Title><ISOAbbreviation>PLoS ONE</ISOAbbreviation></Journal><ArticleTitle>Household transmission of influenza A(H1N1)pdm09 in the pandemic and post-pandemic seasons.</ArticleTitle><Pagination><MedlinePgn>e108485</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1371/journal.pone.0108485</ELocationID><Abstract><AbstractText Label="BACKGROUND" NlmCategory="BACKGROUND">The transmission of influenza viruses occurs person to person and is facilitated by contacts within enclosed environments such as households. The aim of this study was to evaluate secondary attack rates and factors associated with household transmission of laboratory-confirmed influenza A(H1N1)pdm09 in the pandemic and post-pandemic seasons.</AbstractText><AbstractText Label="METHODS" NlmCategory="METHODS">During the 2009-2010 and 2010-2011 influenza seasons, 76 sentinel physicians in Navarra, Spain, took nasopharyngeal and pharyngeal swabs from patients diagnosed with influenza-like illness. A trained nurse telephoned households of those patients who were laboratory-confirmed for influenza A(H1N1)pdm09 to ask about the symptoms, risk factors and vaccination status of each household member.</AbstractText><AbstractText Label="RESULTS" NlmCategory="RESULTS">In the 405 households with a patient laboratory-confirmed for influenza A(H1N1)pdm09, 977 susceptible contacts were identified; 16% of them (95% CI 14-19%) presented influenza-like illness and were considered as secondary cases. The secondary attack rate was 14% in 2009-2010 and 19% in the 2010-2011 season (p=0.049), an increase that mainly affected persons with major chronic conditions. In the multivariate logistic regression analysis, the risk of being a secondary case was higher in the 2010-2011 season than in the 2009-2010 season (adjusted odds ratio: 1.72; 95% CI 1.17-2.54), and in children under 5 years, with a decreasing risk in older contacts. Influenza vaccination was associated with lesser incidence of influenza-like illness near to statistical significance (adjusted odds ratio: 0.29; 95% CI 0.08-1.03).</AbstractText><AbstractText Label="CONCLUSION" NlmCategory="CONCLUSIONS">The secondary attack rate in households was higher in the second season than in the first pandemic season. Children had a greater risk of infection. Preventive measures should be maintained in the second pandemic season, especially in high-risk persons.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Casado</LastName><ForeName>Itziar</ForeName><Initials>I</Initials><AffiliationInfo><Affiliation>Complejo Hospitalario de Navarra, Pamplona, Spain; Instituto de Salud Pública de Navarra, Pamplona, Spain.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Martínez-Baz</LastName><ForeName>Iván</ForeName><Initials>I</Initials><AffiliationInfo><Affiliation>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Burgui</LastName><ForeName>Rosana</ForeName><Initials>R</Initials><AffiliationInfo><Affiliation>Instituto de Salud Pública de Navarra, Pamplona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, 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