What are common diseases in poultry known to cause economic loss?

Avian influenza and Newcastle disease are two of the most significant viral diseases that affect poultry and are well-documented for causing substantial economic losses in the poultry industry. Both of these diseases can lead to severe health impacts within flocks, resulting in high mortality rates and decreased productivity. For example, avian influenza can cause respiratory distress, reduced egg production, and, in some cases, complete flock depopulation as a control measure to prevent the spread of the disease. Newcastle disease similarly leads to respiratory issues, nervous system disorders, and decreased egg quality and quantity, ultimately impacting the supply chain and profitability for poultry producers.

Economic loss from these diseases not only stems from the immediate effects on bird health and production but also includes the costs associated with disease control measures, such as biosecurity practices, vaccination programs, and potential trade restrictions imposed by regulatory agencies in response to outbreaks. Therefore, understanding and managing these diseases is a critical aspect of maintaining a viable poultry operation.

In contrast, minor infections that have no impact would not lead to economic loss on any significant scale; diseases unrelated to production would not affect the poultry industry at all; and conditions like cancer and obesity, while they may affect individual birds, do not commonly represent widespread issues that would lead to substantial