[Buxtonella sulcata, an intestinal ciliate of apparently frequent occurrence in Danish cattle (author's transl)].

Faeces samples from 762 apparently healthy heifers were examined for eggs of Fasciola hepatica (sedimentation test). At the same time possible ciliate cysts were recorded. Such cysts, usually circular, and varying in size from ab. 55 micrometer to ab. 95 micrometer (average ab. 71 micrometer) were found in 71.8 % of the samples. According to morphological descriptions in literature, the cysts observed are supposed mainly to represent the species Buxtonella sulcata. Their presence in faeces samples seems to give no differential diagnostic problems relative to parasite eggs or coccidial oocysts.