Avian influenza

Avian influenza

Avian Influenza (AI) or "Bird Flu" is a highly contagious viral infection which can affect all species of birds and can manifest itself in different ways depending mainly on the ability of the virus to cause disease (pathogenicity) and on the species affected.

Influenza infections in birds are divided in two groups on the basis of their pathogenicity:

  • Highly Pathogenic Avian Influenza (HPAI): spreads rapidly causing serious disease with high mortality (up to 100% within 48 hours) in most poultry species (except domestic waterfowl)
  • Low Pathogenic Avian Influenza (LPAI): causing generally a mild disease, may easily go undetected

Highly pathogenic avian influenza outbreaks starting 10/2016

In 2016, the highly pathogenic avian influenza (HPAI) H5N8 virus was first detected in a wild bird (mute swan) found dead at a Hungarian lake on 27 October. The virus has since been identified in wild birds, poultry farms and or captive bird holdings (e.g. in zoos) in 19 Member States: Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, France, Germany, Greece, Hungary, Italy, Luxembourg, the Netherlands, Poland, Slovakia, Spain, Sweden, Romania, and the United Kingdom. Member States with a high density of duck and geese holdings were most affected. Finland, Ireland, Lithuania, Portugal and Slovenia identified the virus only in wild birds.

Latest Developments

Outbreaks in poultry and cases in wild birds have sharply declined since the end of April. However, since July 2017, Italy has confirmed new outbreaks in poultry in the regions of Emilia Romagna, Veneto and Lombardy. Italy, as well as Germany, the United Kingdom and EU neighbour Switzerland have found a few infected wild birds (swans and mallards). Bulgaria has detected two outbreaks in poultry holdings in Dobrich and Haskovo regions.

The veterinary authorities of affected Member States immediately took EU control measures (Council Directive 2005/94/EC) to possibly prevent virus spread to other poultry holdings and established protection and surveillance zones around the infected holdings. The Commission continues to call for maintaining extreme vigilance and strict biosecurity on farms to prevent contacts between wild birds and poultry. It has adopted urgent protective measures in relation to these outbreaks. The disease situation and the measures adopted by the Commission are regularly reviewed during the periodical meetings of EU Member State experts at the Standing Committee on Plants, Animals, Food and Feed.

The Commission has also adopted rules on biosecurity and risk mitigating measures on poultry farms, in particular directed at preventing contact with wild birds, as well as early detection systems. The implementation of these measures by the farmers is crucial to prevent further outbreaks on farms.

A detailed overview on the situation in Member States and the adopted measures is given in the Chronology of events, a map and in the ADNS overview reports.

The European Food Safety Authority has published a scientific opinion and an overview report on avian influenza.

The European Centre for Disease Prevention and Control publishes reports and risk assessments in relation to the relevance of avian influenza for humans: risk assessment on public health.

The EU works closely with international partners in the fight against avian influenza. Regular contacts and information exchange occur between the European Commission, the World Organisation for Animal Health (OIE), the World Health Organisation (WHO) and the Food and Agriculture Organisation (FAO).

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EU legislation

Surveillance for Avian Influenza


Emergency and control measures

Chief Veterinary Officers and EU-RLs

Human Health Implications

Highly Pathogenic Avian Influenza