This latest outbreak is part of a broader epizootic that has swept across the United States, affecting not only poultry but also wild birds, mammals and humans.

A case of avian influenza, also known as bird flu, has been confirmed at a commercial poultry farm in Norfolk. The highly pathogenic virus was detected at a premises near Loddon, the Department for Environment, Food and Rural Affairs (Defra) said.

Pennsylvania officials are warning about the first case of bird flu at a commercial poultry farm in the state.

A flock of turkeys has tested positive for high-path avian influenza, marking the second case in the state this year.