The dead swan that was recently found in Lednice, south Moravia area of the Czech republic, died of dangerous H5N1 strain of bird flu, regional veterinary administration head Jaroslav Salava confirmed on Thursday.

Veterinaries have marked two 1-km zones around the pond where the swan was found and around the other ponds in Lednice, where safety measures will be applied.

The Lednice ponds, along with the nearby Musov lakes, rank among the most risky areas with a large movement of wild birds.

There is no information about a clinical manifestation of the illness, according to Salava.

Two cases of dangerous H5N1 strain of bird flu had already been uncovered at two poultry farms in east Bohemia area this month.

The first case of bird flu in the Czech Republic was found in March 2006 after which 13 cases of the disease have been registered. In all cases birds have been infected by the H5N1 virus, which also poses danger to human beings.

Source: Xinhua