Molecular epidemiological analysis of the transboundary transmission of 2003 highly pathogenic avian influenza H7N7 outbreaks between the Netherlands and Belgium.
Identifieur interne : 000052 ( Main/Corpus ); précédent : 000051; suivant : 000053Molecular epidemiological analysis of the transboundary transmission of 2003 highly pathogenic avian influenza H7N7 outbreaks between the Netherlands and Belgium.
Auteurs : S. Van Borm ; M. Jonges ; B. Lambrecht ; G. Koch ; P. Houdart ; T. Van Den BergSource :
- Transboundary and emerging diseases [ 1865-1682 ] ; 2014.
English descriptors
- KwdEn :
- Animal Husbandry (standards), Animals, Belgium (epidemiology), Disease Outbreaks (veterinary), Genetic Variation, Germany (epidemiology), Influenza A Virus, H7N7 Subtype (genetics), Influenza A Virus, H7N7 Subtype (pathogenicity), Influenza in Birds (epidemiology), Influenza in Birds (transmission), Influenza in Birds (virology), Molecular Epidemiology (methods), Netherlands (epidemiology), Population Control (methods), Poultry (virology), Risk Factors, Sequence Analysis, Turkeys (virology).
- MESH :
- epidemiology : Belgium, Germany, Influenza in Birds, Netherlands.
- genetics : Influenza A Virus, H7N7 Subtype.
- methods : Molecular Epidemiology, Population Control.
- pathogenicity : Influenza A Virus, H7N7 Subtype.
- standards : Animal Husbandry.
- transmission : Influenza in Birds.
- veterinary : Disease Outbreaks.
- virology : Influenza in Birds, Poultry, Turkeys.
- Animals, Genetic Variation, Risk Factors, Sequence Analysis.
Abstract
The 2003 outbreak of Highly pathogenic avian influenza (HPAI) A(H7N7) in the Netherlands, Belgium and Germany resulted in significant genetic diversification that proved informative for tracing transmission events. Building on previous investigations on the Dutch outbreak, we focused on the potential transnational transmissions between the Netherlands and Belgium. Although no clear epidemiological links could be identified from the tracing data, the transmission network based on concatenated HA-NA-PB2 sequences supports at least three independent introductions from the Netherlands to Belgium and suggests one possible introduction form Belgium back to the Netherlands. Two introductions in the Belgian province of Limburg occurred from nearby farms in the Dutch province of Limburg. One introduction resulted in three secondary infected farms, while a second introduction did not cause secondary infections. The third introduction into Belgium occurred in the north of the Antwerp province, very close to the national border, and originated from the North of the Dutch province Brabant (long distance transmission, >65 km). The virus spread to two additional Belgian farms, one of which may be the source of a secondarily infected farm in the Netherlands. One infected turkey farm in the province of Antwerp (Westmalle) was geographically close to the latter introduction, but genetically clustered with the first introduction event in the Limburg province. Epidemiological tracing data could neither confirm nor exclude whether this outbreak was a result from long distance contacts within Belgium or whether this farm presented a fourth independent transboundary introduction. These multiple transnational transmissions of HPAI in spite of reinforced biosecurity measures and trade restrictions illustrate the importance of international cooperation, legislation and standardization of tools to combat transboundary diseases.
DOI: 10.1111/tbed.12009
PubMed: 22994451
Links to Exploration step
pubmed:22994451Le document en format XML
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<author><name sortKey="Koch, G" sort="Koch, G" uniqKey="Koch G" first="G" last="Koch">G. Koch</name>
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<author><name sortKey="Houdart, P" sort="Houdart, P" uniqKey="Houdart P" first="P" last="Houdart">P. Houdart</name>
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<term>Influenza A Virus, H7N7 Subtype (genetics)</term>
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<front><div type="abstract" xml:lang="en">The 2003 outbreak of Highly pathogenic avian influenza (HPAI) A(H7N7) in the Netherlands, Belgium and Germany resulted in significant genetic diversification that proved informative for tracing transmission events. Building on previous investigations on the Dutch outbreak, we focused on the potential transnational transmissions between the Netherlands and Belgium. Although no clear epidemiological links could be identified from the tracing data, the transmission network based on concatenated HA-NA-PB2 sequences supports at least three independent introductions from the Netherlands to Belgium and suggests one possible introduction form Belgium back to the Netherlands. Two introductions in the Belgian province of Limburg occurred from nearby farms in the Dutch province of Limburg. One introduction resulted in three secondary infected farms, while a second introduction did not cause secondary infections. The third introduction into Belgium occurred in the north of the Antwerp province, very close to the national border, and originated from the North of the Dutch province Brabant (long distance transmission, >65 km). The virus spread to two additional Belgian farms, one of which may be the source of a secondarily infected farm in the Netherlands. One infected turkey farm in the province of Antwerp (Westmalle) was geographically close to the latter introduction, but genetically clustered with the first introduction event in the Limburg province. Epidemiological tracing data could neither confirm nor exclude whether this outbreak was a result from long distance contacts within Belgium or whether this farm presented a fourth independent transboundary introduction. These multiple transnational transmissions of HPAI in spite of reinforced biosecurity measures and trade restrictions illustrate the importance of international cooperation, legislation and standardization of tools to combat transboundary diseases. </div>
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<Abstract><AbstractText>The 2003 outbreak of Highly pathogenic avian influenza (HPAI) A(H7N7) in the Netherlands, Belgium and Germany resulted in significant genetic diversification that proved informative for tracing transmission events. Building on previous investigations on the Dutch outbreak, we focused on the potential transnational transmissions between the Netherlands and Belgium. Although no clear epidemiological links could be identified from the tracing data, the transmission network based on concatenated HA-NA-PB2 sequences supports at least three independent introductions from the Netherlands to Belgium and suggests one possible introduction form Belgium back to the Netherlands. Two introductions in the Belgian province of Limburg occurred from nearby farms in the Dutch province of Limburg. One introduction resulted in three secondary infected farms, while a second introduction did not cause secondary infections. The third introduction into Belgium occurred in the north of the Antwerp province, very close to the national border, and originated from the North of the Dutch province Brabant (long distance transmission, >65 km). The virus spread to two additional Belgian farms, one of which may be the source of a secondarily infected farm in the Netherlands. One infected turkey farm in the province of Antwerp (Westmalle) was geographically close to the latter introduction, but genetically clustered with the first introduction event in the Limburg province. Epidemiological tracing data could neither confirm nor exclude whether this outbreak was a result from long distance contacts within Belgium or whether this farm presented a fourth independent transboundary introduction. These multiple transnational transmissions of HPAI in spite of reinforced biosecurity measures and trade restrictions illustrate the importance of international cooperation, legislation and standardization of tools to combat transboundary diseases. </AbstractText>
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