The damage, caused by bird flu virus to Southern Federal District, is rather serious, the Russian chief sanitary inspector Genady Onischenko has told to the journalists on Monday. "Considerable damage was caused to Dagestan. About 700-900 thousands of 2,5 million poultry", noted he. "In Krasnodar region the battery farm "Tbilisskaya" was affected. Cases of poultry disease have been registered in four more districts ", said Onischenko. He noted that the mission of sanitary services and executive power is to cut short the situation and to prevent the virus from spreading. As earlier was informed, the first information about mass plague of poultry killed over 300 thousand of hen-layers. The plague of the poultry at Krasnodar battery farm started on February 23, when 24 thousand birds died.