8.1 Zoning
Zoning is one of the early actions to be taken when there is an
incursion of ASF into a country. Zoning is the proclamation of
geographical areas within a country into infected zones, surveillance
zones and free zones. To prevent further spread of infection, the
infected zones should implement two objectives: (i) quarantine and
livestock movement controls and (ii) remove sources of infection as
quickly as possible through slaughter of potentially infected pigs, safe
disposal of carcasses and decontamination. Accordingly, active disease
surveillance and preventing the entry of the disease by banning entry of
pigs and pig products from the infected zones are actions which are
associated with ASF surveillance and disease-free zones respectively
(FAO, 1999).