Volume 14, Number 4—April 2008
Perspective
Bluetongue Epidemiology in the European Union
Figure 1

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.
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