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Bluetongue epidemiology in the European Union.

Saegerman C, Berkvens D, Mellor PS - Emerging Infect. Dis. (2008)

Bottom Line: Since August 2006, BTV-8 has caused a severe epizootic of BT in northern Europe.In addition, the radial extension of BTV-8 across Europe increases the risk for an encounter between this serotype and others, particularly those that occur in the Mediterranean Basin, where vector activity continues for more of the year.This condition increases the risk for reassortment of individual BTV gene segments.

View Article: PubMed Central - PubMed

Affiliation: Department of Infectious and Parasitic Diseases, Epidemiology and Risk Analysis Applied to Veterinary, University of Liège, Liège, Belgium. claude.saegerman@ulg.ac.be

ABSTRACT
Bluetongue (BT) is a reportable disease of considerable socioeconomic concern and of major importance in the international trade of animals and animal products. Before 1998, BT was considered an exotic disease in Europe. From 1998 through 2005, at least 6 BT virus strains belonging to 5 serotypes (BTV-1, BTV-2, BTV-4, BTV-9, and BTV-16) were continuously present in the Mediterranean Basin. Since August 2006, BTV-8 has caused a severe epizootic of BT in northern Europe. The widespread recrudescence and extension of BTV-8 infections in northern Europe during 2007 suggest that requirements for BTV establishment may now be fulfilled in this area. In addition, the radial extension of BTV-8 across Europe increases the risk for an encounter between this serotype and others, particularly those that occur in the Mediterranean Basin, where vector activity continues for more of the year. This condition increases the risk for reassortment of individual BTV gene segments.

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Related in: MedlinePlus

The molecular epidemiology of bluetongue virus (BTV) since 1998: routes of introduction of different serotypes and individual virus strains. *Presence of BTV-specific neutralizing antibodies in animals in Bulgaria, but the presence of BTV serotype 8 cannot yet be confirmed.
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Figure 1: The molecular epidemiology of bluetongue virus (BTV) since 1998: routes of introduction of different serotypes and individual virus strains. *Presence of BTV-specific neutralizing antibodies in animals in Bulgaria, but the presence of BTV serotype 8 cannot yet be confirmed.

Mentions: During this 8-year period, at least 6 BTV strains belonging to 5 serotypes (BTV-1, BTV-2, BTV-4, BTV-9, and BTV-16) have been continuously present in parts of the Mediterranean Basin, including several member states of the EU (Table, Figure 1) (1,5,7–12). This emergence of BT into parts of Europe never before affected was attributed mainly to climate change and was linked to the northern expansion of the major Old World vector Culicoides imicola (Kieffer), which is an Afro-Asiatic species of biting midge (13). Additionally, novel indigenous European vector species of Culicoides within the Obsoletus and Pulicaris complexes were involved.


Bluetongue epidemiology in the European Union.

Saegerman C, Berkvens D, Mellor PS - Emerging Infect. Dis. (2008)

The molecular epidemiology of bluetongue virus (BTV) since 1998: routes of introduction of different serotypes and individual virus strains. *Presence of BTV-specific neutralizing antibodies in animals in Bulgaria, but the presence of BTV serotype 8 cannot yet be confirmed.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2570923&req=5

Figure 1: The molecular epidemiology of bluetongue virus (BTV) since 1998: routes of introduction of different serotypes and individual virus strains. *Presence of BTV-specific neutralizing antibodies in animals in Bulgaria, but the presence of BTV serotype 8 cannot yet be confirmed.
Mentions: During this 8-year period, at least 6 BTV strains belonging to 5 serotypes (BTV-1, BTV-2, BTV-4, BTV-9, and BTV-16) have been continuously present in parts of the Mediterranean Basin, including several member states of the EU (Table, Figure 1) (1,5,7–12). This emergence of BT into parts of Europe never before affected was attributed mainly to climate change and was linked to the northern expansion of the major Old World vector Culicoides imicola (Kieffer), which is an Afro-Asiatic species of biting midge (13). Additionally, novel indigenous European vector species of Culicoides within the Obsoletus and Pulicaris complexes were involved.

Bottom Line: Since August 2006, BTV-8 has caused a severe epizootic of BT in northern Europe.In addition, the radial extension of BTV-8 across Europe increases the risk for an encounter between this serotype and others, particularly those that occur in the Mediterranean Basin, where vector activity continues for more of the year.This condition increases the risk for reassortment of individual BTV gene segments.

View Article: PubMed Central - PubMed

Affiliation: Department of Infectious and Parasitic Diseases, Epidemiology and Risk Analysis Applied to Veterinary, University of Liège, Liège, Belgium. claude.saegerman@ulg.ac.be

ABSTRACT
Bluetongue (BT) is a reportable disease of considerable socioeconomic concern and of major importance in the international trade of animals and animal products. Before 1998, BT was considered an exotic disease in Europe. From 1998 through 2005, at least 6 BT virus strains belonging to 5 serotypes (BTV-1, BTV-2, BTV-4, BTV-9, and BTV-16) were continuously present in the Mediterranean Basin. Since August 2006, BTV-8 has caused a severe epizootic of BT in northern Europe. The widespread recrudescence and extension of BTV-8 infections in northern Europe during 2007 suggest that requirements for BTV establishment may now be fulfilled in this area. In addition, the radial extension of BTV-8 across Europe increases the risk for an encounter between this serotype and others, particularly those that occur in the Mediterranean Basin, where vector activity continues for more of the year. This condition increases the risk for reassortment of individual BTV gene segments.

Show MeSH
Related in: MedlinePlus