title: [Investigations concerning bovine gastro-intestinal strongyles. III. Faecal egg output in the 2nd grazing period (author's transl)].
abstract: Parasitological examination was made on 5065 faeces samples from about 850 cattle, mainly heifers during their 2nd grazing season. The cattle, the majority of which were apparently in good health, were included in a study on weight gains as related to different grazing systems. The samples, which were examined by a modified McMaster technique, were taken through the period April--October in four consecutive years (1971--1974). The monthly occurrence of positive samples (EPG less than or equal to 50) was rather low but fairly stable during the period concerned (Fig. 2 A). The average daily production of trichostrongylid eggs could not be determined exactly (Fig. 2B), but was estimated at about 1.5 million per animal. Larval cultures were made on randomly selected faeces samples. Ostertagia accounted for 58.4% of the identified larvae, and tended to increase in predominance as the grazing period progressed (Fig. 3). Cooperia, constituting 29.4% of the larval population, and other genera, constituting maximum 7% each, showed a declining representation during the grazing season.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology*; D003718:Denmark; D005243:Feces / Q000469:parasitology*; D005260:Female; D008297:Male; D010270:Parasite Egg Count; D012621:Seasons; D014252:Trichostrongyloidiasis / Q000453:epidemiology / Q000662:veterinary*
vernacular_title: Undersøgelser vedrørende løbe-tarmstrongylider hos kvaeg. III. Faecal aegudskillelse i 2. graesningassaeson.