At the same time pressure for reduced medication from supermarket buyers and consumers is becoming more apparent. We must aim to prevent spread of infection between different batches of pigs to enable these systems to work. Spread of disease between batches occurs in three main ways, Static Vectors, Mobile Vectors, and, Nutrient Vectors. Static vectors are those which remain on a site or in a house following removal of the pigs. Mobile vectors are those which carry infection to a site or house.
Nutrient vectors are a special form of mobile vector.
Disease Control 3. Terminal disinfection, at the end of a batch is used to control static vectors, while continuous disinfection can be used to control mobile vectors and nutrient vectors. Terminal Disinfection depends on complete removal of all animals from the building or site. It is important to allow adequate time for the completion of the whole programme. Removable equipment should be taken out and cleaned separately.