Authorities in Sofia said samples are being sent to Britain to test whether the bird was infected with the H5N1 strain that can kill people.
Bulgaria's neighbors, Romania and Turkey, have both suffered outbreaks of the deadly H5N1 strain of the virus.
Bulgarian Agriculture Minister Nihat Kabil said on 23 February that he has put veterinary offices on high alert, but stressed that the discovery of one bird with the infection does not mean there is a danger of a wider outbreak.
Click on the map for a closer view of the areas within RFE/RL's broadcast region where cases of diseased fowl have been confirmed. Last updated on February 20.
BIRD FLU, or avian influenza, continues to menace scattered areas from East Asia, where the disease first appeared, to Southeastern and Eastern Europe and beyond. Authorities around the world are bracing themselves -- and, more importantly, planning and taking measures to fight the disease wherever it appears.
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