Re-Emergence of BTV-4 in Sheep Farms in Kosovo, 2020: A Retrospective Study

Figure 3

Maps of countries in the Balkan Peninsula showing the spatial distribution of BTV activity between 1998 and 2013 (a) and 2014 and 2020 (b), and closeup of Kosovo (c) to provide additional details in the region. White areas indicate Balkan countries, whereas countries outside of the Balkan Peninsula are shown by grey areas. BTV-1, BTV-4, BTV-8, BTV-9, and BTV-16 positive cases are represented by green, blue, black, purple, and orange dotted circles, respectively. Red dotted circles represent BTV-4 positive cases from the outbreak in Kosovo in 2020. All data of BTV occurrences were retrieved from the literature and the World Organisation for Animal Health (WOAH) database.