Ecologic Risk Factor Investigation of Clusters of Avian Influenza A (H5N1) Virus Infection in Thailand
Identifieur interne : 002C44 ( Main/Exploration ); précédent : 002C43; suivant : 002C45Ecologic Risk Factor Investigation of Clusters of Avian Influenza A (H5N1) Virus Infection in Thailand
Auteurs : Thanawat Tiensin [Pays-Bas] ; Syed Sayeem Uddin Ahmed [Bangladesh] ; Suvichai Rojanasthien ; Thaweesak Songserm ; Parntep Ratanakorn [Thaïlande] ; Kridsada Chaichoun [Thaïlande] ; Wantanee Kalpravidh ; Surapong Wongkasemjit ; Tuangthong Patchimasiri ; Karoon Chanachai ; Weerapong Thanapongtham ; Suwit Chotinan ; Arjan Stegeman [Pays-Bas] ; Mirjam Nielen [Pays-Bas]Source :
- The Journal of Infectious Diseases [ 0022-1899 ] ; 2009.
Abstract
This study was conducted to investigate space and time clusters of highly pathogenic avian influenza A (H5N1) virus infection and to determine risk factors at the subdistrict level in Thailand. Highly pathogenic avian influenza A (H5N1) was diagnosed in 1890 poultry flocks located in 953 subdistricts during 2004–2007. The ecologic risk for H5N1 virus infection was assessed on the basis of a spatial‐based case‐control study involving 824 case subdistricts and 3296 control subdistricts from 6 study periods. Risk factors investigated in clustered areas of H5N1 included human and animal demographic characteristics, poultry production systems, and wild birds and their habitats. Six variables remained statistically significant in the final model: flock density of backyard chickens (odds ratio [OR], 0.98), flock density of fighting cocks (OR, 1.02), low and high human density (OR, 0.60), presence of quail flocks (OR, 1.21), free‐grazing duck flocks (OR, 2.17), and a poultry slaughterhouse (OR, 1.33). We observed a strong association between subdistricts with H5N1 virus–infected poultry flocks and evidence of prior and concomitant H5N1 infection in wild birds in the same subdistrict.
Url:
DOI: 10.1086/599207
Affiliations:
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type="city">Utrecht</settlement><region nuts="2" type="province">Utrecht (province)</region></placeName><orgName type="university">Université d'Utrecht</orgName></affiliation><affiliation></affiliation><affiliation></affiliation></author><author><name sortKey="Ahmed, Syed Sayeem Uddin" sort="Ahmed, Syed Sayeem Uddin" uniqKey="Ahmed S" first="Syed Sayeem Uddin" last="Ahmed">Syed Sayeem Uddin Ahmed</name><affiliation wicri:level="1"><country xml:lang="fr">Bangladesh</country><wicri:regionArea>Department of Medicine and Surgery, Chittagong Veterinary and Animal Sciences University, Chittagong</wicri:regionArea><wicri:noRegion>Chittagong</wicri:noRegion></affiliation></author><author><name sortKey="Rojanasthien, Suvichai" sort="Rojanasthien, Suvichai" uniqKey="Rojanasthien S" first="Suvichai" last="Rojanasthien">Suvichai Rojanasthien</name><affiliation><wicri:noCountry code="subField">and</wicri:noCountry></affiliation></author><author><name sortKey="Songserm, Thaweesak" sort="Songserm, 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type="published">2009</date><biblScope unit="vol">199</biblScope><biblScope unit="issue">12</biblScope><biblScope unit="page" from="1735">1735</biblScope><biblScope unit="page" to="1743">1743</biblScope></imprint><idno type="ISSN">0022-1899</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-1899</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract">This study was conducted to investigate space and time clusters of highly pathogenic avian influenza A (H5N1) virus infection and to determine risk factors at the subdistrict level in Thailand. Highly pathogenic avian influenza A (H5N1) was diagnosed in 1890 poultry flocks located in 953 subdistricts during 2004–2007. The ecologic risk for H5N1 virus infection was assessed on the basis of a spatial‐based case‐control study involving 824 case subdistricts and 3296 control subdistricts from 6 study periods. Risk factors investigated in clustered areas of H5N1 included human and animal demographic characteristics, poultry production systems, and wild birds and their habitats. Six variables remained statistically significant in the final model: flock density of backyard chickens (odds ratio [OR], 0.98), flock density of fighting cocks (OR, 1.02), low and high human density (OR, 0.60), presence of quail flocks (OR, 1.21), free‐grazing duck flocks (OR, 2.17), and a poultry slaughterhouse (OR, 1.33). We observed a strong association between subdistricts with H5N1 virus–infected poultry flocks and evidence of prior and concomitant H5N1 infection in wild birds in the same subdistrict.</div></front></TEI><affiliations><list><country><li>Bangladesh</li><li>Pays-Bas</li><li>Thaïlande</li></country><region><li>Utrecht (province)</li></region><settlement><li>Utrecht</li></settlement><orgName><li>Université d'Utrecht</li></orgName></list><tree><noCountry><name sortKey="Chanachai, Karoon" sort="Chanachai, Karoon" uniqKey="Chanachai K" first="Karoon" last="Chanachai">Karoon Chanachai</name><name sortKey="Chotinan, Suwit" sort="Chotinan, Suwit" uniqKey="Chotinan S" first="Suwit" last="Chotinan">Suwit Chotinan</name><name sortKey="Kalpravidh, Wantanee" sort="Kalpravidh, Wantanee" uniqKey="Kalpravidh W" first="Wantanee" last="Kalpravidh">Wantanee Kalpravidh</name><name sortKey="Patchimasiri, Tuangthong" sort="Patchimasiri, Tuangthong" uniqKey="Patchimasiri T" first="Tuangthong" last="Patchimasiri">Tuangthong Patchimasiri</name><name sortKey="Rojanasthien, Suvichai" sort="Rojanasthien, Suvichai" uniqKey="Rojanasthien S" first="Suvichai" last="Rojanasthien">Suvichai Rojanasthien</name><name sortKey="Songserm, Thaweesak" sort="Songserm, Thaweesak" uniqKey="Songserm T" first="Thaweesak" last="Songserm">Thaweesak Songserm</name><name sortKey="Thanapongtham, Weerapong" sort="Thanapongtham, Weerapong" uniqKey="Thanapongtham W" first="Weerapong" last="Thanapongtham">Weerapong Thanapongtham</name><name sortKey="Wongkasemjit, Surapong" sort="Wongkasemjit, Surapong" uniqKey="Wongkasemjit S" first="Surapong" last="Wongkasemjit">Surapong Wongkasemjit</name></noCountry><country name="Pays-Bas"><region name="Utrecht (province)"><name sortKey="Tiensin, Thanawat" sort="Tiensin, Thanawat" uniqKey="Tiensin T" first="Thanawat" last="Tiensin">Thanawat Tiensin</name></region><name sortKey="Nielen, Mirjam" sort="Nielen, Mirjam" uniqKey="Nielen M" first="Mirjam" last="Nielen">Mirjam Nielen</name><name sortKey="Stegeman, Arjan" sort="Stegeman, Arjan" uniqKey="Stegeman A" first="Arjan" last="Stegeman">Arjan Stegeman</name></country><country name="Bangladesh"><noRegion><name sortKey="Ahmed, Syed Sayeem Uddin" sort="Ahmed, Syed Sayeem Uddin" uniqKey="Ahmed S" first="Syed Sayeem Uddin" last="Ahmed">Syed Sayeem Uddin Ahmed</name></noRegion></country><country name="Thaïlande"><noRegion><name sortKey="Ratanakorn, Parntep" sort="Ratanakorn, Parntep" uniqKey="Ratanakorn P" first="Parntep" last="Ratanakorn">Parntep Ratanakorn</name></noRegion><name sortKey="Chaichoun, Kridsada" sort="Chaichoun, Kridsada" uniqKey="Chaichoun K" first="Kridsada" last="Chaichoun">Kridsada Chaichoun</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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