What is Newcastle Disease?

Newcastle disease is a widespread, highly contagious disease caused by the avian paramyxovirus (APMV), also known as Newcastle disease virus (NDV). It targets chickens and many other birds.

There are various strains of the virus circulating. Some incur mild symptoms, whereas virulent strains can wipe out entire unvaccinated flocks. In acute cases, birds can die very rapidly.

It’s a worldwide virus that’s ever-present at a baseline level and pops up now and then. It’s a notifiable disease, so there is a duty to report Newcastle disease outbreaks.

The virulent strains of the virus are not currently present in the US. However, flocks are tested for Newcastle disease and avian influenza whenever a large number of birds perish in a single day. Previous outbreaks have led to the slaughtering of thousands of chickens and export bans.

The Newcastle disease virus can also infect humans, causing mild fevers, eye irritation, and a general feeling of illness.