[Fasciola hepatica in Denmark. A survey on 15 years diagnostic examination on bovine faeces samples (author's transl)].

The results of routine diagnostic examinations of 10,540 bovine faeces samples for eggs of Fasciola hepatica during the period 1963-1977 are evaluated. 0n an average, 10.4% of the samples were positive. The frequency of positive samples was highest among samples from cows (14.4%) lowest among samples from calves (1.5%). Of samples from heifers 10.1% were found positive. Calculated on a monthly basis, the percentage of positive samples showed a clear seasonal variation, reaching a peak in the period December-March. During the period 1973-1977, the annual percentage of positive samples showed a rather pronounced declining tendency, indicating a decrease in the occurrence of bovine Fasciola hepatica infection in Denmark.