Virulent Newcastle disease is a disease that affects birds, especially chickens. It is caused by a virus that spreads from bird to bird.
When a bird gets infected with the virus, it can become very sick. It may stop eating and drinking, and have trouble breathing. Its feathers might also become ruffled, and it might stop laying eggs.
Unfortunately, the virus can also spread very quickly from one bird to another. Birds can get the virus from being near other infected birds, or even from their droppings.
To stop the virus from spreading, people who raise chickens must take special precautions. They may need to separate sick birds from healthy ones, and even quarantine an entire flock if many birds become sick. People may also need to clean and disinfect their equipment and living spaces more often to prevent the virus from spreading.
Overall, virulent Newcastle disease can be very serious for birds and can cause a lot of problems for the people who raise them. But with the right care and attention, it can be controlled and prevented.