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Field trials in sheep with the anthelmintic pyrantel tartrate. Comparative trials in the prevention of Nematodirus infection in lambs

Cornwell, R.L.

Veterinary Record 79(22): 626-629

1966


ISSN/ISBN: 0042-4900
PMID: 6008126
Accession: 014480021

840 sheep on 7 farms in 3 different areas of Britain were used in a field trial to compare pyrantel tartrate, bephenium hydroxynaphthoate and thiabendazole for the control of Nematodirus and Ostertagia in month-old lambs. 3 doses of each drug were given with a 3-week interval between doses. Lambs up to 35 lb. and those 36 to 75 lb. were given 0.35 g. and 0.7 g. of pyrantel tartrate respectively. 5g. of bephenium hydroxynaphthoate or 2 g. of thiabendazole were given irrespective of weight. Compared with controls the lambs receiving pyrantel tartrate gained 13.6% (4.4 Ib.), those receiving bephenium hydroxynaphthoate 10.3% (3.3 Ib.) and those receiving thiabendazole 7.1% (2.3 Ib.). Worm counts carried out on a selected sample of the lambs after each treatment showed that all the drugs were effective in keeping worm burden low.

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