Pairs of milch cows (one nematode-infected and one uninfected) on 2 farms in Czechoslovakia received either 10 mg/kg body-weight of pure levamisole orally or 30 ml Nilverm/animal by drench; similar but untreated pairs were controls. By day 50 after levamisole treatment one previously infected cow...

In newly-established large herds of cattle in the neighbourhood of Tachov (western border of Czechoslovakia), Oesophagostomum, Cooperia, Trichostrongylus and Haemonchus contortus predominated, being present in animals of all ages. Ostertagia, Nematodirus, Trichuris, Chabertia ovina and Bunostomum...

The incidence and age variation of helminth infections in newly-established industrial cattle herds near Takhov, Czechoslovakia, are described. Gastro-intestinal nematodes, particularly Oesophagostomum spp., Haemonchus contortus, Cooperia spp. and Trichostrongylus spp., caused the most frequent...

Larvae of Nematodirus, Ostertagia, Chabertia and Trichostrongylus were shown to survive from July of one year to June of the next on an enclosed sheep pasture in Czechoslovakia. In April and May, 88% and 90%, respectively, of grass samples showed the presence of these larvae, and 70% and 72% of...