English Abstract This report informs about the sero-epizootiological
surveillance of T.spiralis infections in the dutch fattening pig population
in the period 1985-1990. Blood samples were collected at random at
abattoirs all over the country. For practical reasons the actual number of
abattoirs was declined after 1988. care was always taken for a sufficient
geographical spread in the origin of the animals. The investigations were
carried out in the laboratory of the National Service for Animal and Meat
Inspection, according to standard procedures as described earlier. In the
period 1985-1990 no changes in the epizootiological situation could be
demonstrated. This was supported by data obtained from examinations at
selected farms. In farms where so-called 'seropositive' animals were found,
other pigs present and rodents captured were examined for T.spiralis
infection. No such foci could be spotted. In conclusion it can be stated
that T.spiralis infections do not occur in dutch fattening
pigs.
