Abstract
Faecal egg count and milk production data are given for 48 pairs of cows from a single herd, paired on previous yield, parity and expected calving date, one of each pair being dosed at calving with 66 mg/kg Thiabendazole. Mean 305 day yields were 5 445 kg and 5 608 kg respectively in treated and control groups, and no significant differences in yield, milk fat or protein were recorded. Faecal egg counts were similar in both groups, a salt flotation method showing 25 – 29% infection and 3.7 – 3.9 epg at mid lactation, and flotation was shown to be more sensitive than a modified McMaster method. Data analysis showed a high degree of within group variation and a consideration of this and other reported data suggests that Zarge groups of cows should be used for these trials in preference to smaller numbers of closely paired animals.
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© 1981 ECSC, EEC, EAEC, Brussels-Luxembourg
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Thomas, R.J., Rowlinson, P. (1981). An Evaluation of Anthelmintic Treatment in a Dairy Herd. In: Nansen, P., Jørgensen, R.J., Soulsby, E.J.L. (eds) Epidemiology and Control of Nematodiasis in Cattle. Current Topics in Veterinary Medicine and Animal Science, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-8311-3_11
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DOI: https://doi.org/10.1007/978-94-009-8311-3_11
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