Newcastle disease (ND) is a highly contagious viral disease of birds particularly domestic poultry.

The H5N1 flu remains mainly a disease of birds, but it has infected 270 people since 2003 and killed 164 of them.

Authorities are investigating a case of suspected avian disease in a broiler breeder flock in Co Fermanagh.

Although it remains mainly an avian disease, scientists fear that if it mutates into disease easily transmittable amongst people, it could kill millions.

Though bird flu, as the name suggests, is mostly an avian disease, it has killed more than half the people known to be infected.

These results are useful to optimize surveillance and control strategy for notifiable avian diseases in African countries with similar agroecological and resource-limited contexts.

Earlier, the Welsh Assembly said it was investigating a suspected outbreak of bird disease at a farm in North Wales.

The H5N1 virus is hard for humans to catch and is mainly a bird disease.

For the moment, H5N1 is hard for humans to catch and is essentially a bird disease.

Although it remains a bird disease, experts still fear it could kill millions once it learns how to pass efficiently among people.

Health officials in the Netherlands have slaughtered more than 100,000 chickens, hoping to contain a contagious bird disease.