Poultry Judging Practice Test

Newcastle disease primarily affects which system in poultry?

1. Reproductive system

2. Respiratory system

3. Digestive system

4. Nervous system

The correct answer is: Respiratory system

Newcastle disease is primarily a viral infection that significantly impacts the respiratory system in poultry. The disease is caused by the Newcastle disease virus (NDV), which specifically targets the respiratory tract, leading to symptoms such as coughing, nasal discharge, and difficulty breathing. These respiratory issues can escalate to more severe complications, particularly in young birds or in environments with poor biosecurity and management practices. While Newcastle disease can have repercussions on other systems, such as the nervous and digestive systems, the defining characteristics and most severe clinical signs are found in the respiratory system. This differentiation is crucial for poultry health management and for identifying the appropriate measures to control and prevent the spread of this disease. Understanding the primary systems affected by various poultry diseases helps in implementing effective biosecurity and vaccination strategies to safeguard flock health.