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  • Title: Development and survival of infective larvae of gastrointestinal nematodes of cattle on pasture in central Kenya.
    Author: Waruiru RM, Munyua WK, Thamsborg SM, Nansen P, Bøgh HO, Gathuma JM.
    Journal: Vet Res Commun; 1998 Jul; 22(5):315-23. PubMed ID: 9778777.
    Abstract:
    On a series of pasture plots, 2 kg pats of bovine faeces containing known numbers of strongylid (Haemonchus, Cooperia, Oesophagostomum and Trichostrongylus) eggs were deposited at intervals of 4 weeks from July 1995 to June 1996. The plots were sampled every 2 weeks after contamination and infective larvae were identified and counted. Larvae of all the genera developed throughout the year, but the pats exposed during the rainy season yielded more abundant larvae on the herbage. Irrespective of the season of deposition of the pats, larvae were found in larger numbers from 2 to 6 weeks after deposition and generally declined to below detectable levels within 12 to 16 weeks of contamination. The comparatively short survival times noted in this experiment may present opportunities for manipulation of the population dynamics of the gastrointestinal nematodes in the tropical environment of Kenya.
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