Findings from the surveillance of avian influenza in wild birds and poultry in Denmark

Avian influenza (AI) is a highly contagious disease that can affect all bird species. The clinical signs include respiratory disease, lethargy, drop in egg production, neurological signs, hemorrhages in shanks, swollen wattles, combs and eyes, and mortality. The severity of disease depends on the virus strain and species of bird, and varies from a subclinical to a highly pathogenic form with up to 100 % mortality within 48 hours.

AI is of high economic importance for the poultry production worldwide. Elimination of the disease is a common goal, and in EU, the disease is mainly controlled by surveillance and stamping out procedures.