How do we know our chicks are vaccinated?

摘要

The poultry industry is continuing to grow in the USA, with approximately eight billion chickens and turkeys being produced annually. In an industry of this size, intense production practices cause vaccination programs to become an even more importantpart of the poultry industry's ability to protect against infectious diseases that threaten to reduce live bird performance. Therefore, it becomes important to know if the vaccinated birds are being effectively protected against the infectious castle disease immunogen has been licensed as a Newcastle disease (NDV) vaccine by the USDA.