Spread of CSF virus (CSFV) occurs via
direct contact between pigs, via indirect contact with
virus-contaminated fomites or via ingestion of products
from infected pigs. The oral route, via swill feeding, has
been responsible for primary disease introductions (Fritzemeier
et al., 2000; Paton and Greiser-Wilke, 2003) and
although currently banned in the EU, the practice
continues in many parts of the world, both with and
without mandatory cooking and the possibility of illegal
activities cannot be ruled out