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A total of 40 cattle in Germany harbouring naturally acquired infections of gastrointestinal nematodes, including Ostertagia spp., Oesophagostomum spp. Cooperia spp., Haemonchus spp., Nematodirus spp. and Trichuris spp., were allocated to a treated or a control group (20 animals/group), and 100...

Mehlhorn, H.; Jones, H. L.; Weatherley, A. J.; Schumacher, B.
Parasitology Research, 1993, 79, 7, pp 603-607