Which statement about classical swine fever surveillance in the United States is accurate?

• A. It relies on testing all imported animals regardless of origin
• B. It uses targeted tissue testing from sick pigs and feral swine
• C. It tests CSF virus in every liver sample from high-risk states
• D. It samples 85% of pigs sent to slaughter

Answer: (B)

Targeted surveillance that focuses on animals showing illness and on feral swine is how classical swine fever is monitored in the United States. This approach uses tissue testing from sick domestic pigs and from feral swine to detect the virus quickly, making efficient use of resources by concentrating efforts where the risk of introduction or spread is highest. It avoids blanket testing of all imported animals, which isn’t how the system is designed to operate, and it doesn’t rely on broad sampling of liver tissues from high-risk states or on large proportions of pigs sent to slaughter.