Which major biosecurity point is one of the four to protect birds from avian influenza?

• A. Increase stocking density
• B. Avoid contact with pigs
• C. Cleaning and disinfection
• D. Avoid contact with waterfowl and their environment

Answer: (C)

Cleaning and disinfection directly reduces the amount of avian influenza virus in the birds’ environment. Regular cleaning removes organic matter and viral particles from housing, equipment, feeders, waterers, and hands, and proper disinfection then kills what remains, cutting the chances of birds becoming infected or shedding virus to others. This approach tackles both direct contact risks and fomite transmission, making it a foundational defense that applies across poultry operations. The other options either raise risk (like higher stocking density) or address different aspects of disease introduction and spread (such as avoiding contact with waterfowl and their environment).