Field studies of the immunisation of lambs with drug-abbreviated infections ofTrichostrongylus colubriformisandOstertagia circumcincta
作者:
M. Stankiewicz,
E. Hadas,
期刊:
New Zealand Veterinary Journal
(Taylor Available online 1996)
卷期:
Volume 44,
issue 5
页码: 182-184
ISSN:0048-0169
年代: 1996
DOI:10.1080/00480169.1996.35969
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Fifty, 5–6 month-old lambs were randomly allocated to five equal groups. Three groups of lambs were immunised by three oxfendazole-abbreviated (artificial) infections ofTrichostrongylus colubriformisandOstertagia circutncincta. Group 1 was immunised with a high dose of larvae, Group 2 with a medium dose and Group 3 with a low dose. A fourth group was treated with oxfendazole only and a fifth group was not treated (control). All groups were grazed together on pasture naturally contaminated with nematode larvae. Immunisation significantly reduced the number of eggs per gram of faeces in all three groups, but the lowest faecal egg count was seen in Group 3 (immunised with the lowest number of larvae). Significantly better liveweight gains and wool weight were observed in Group 2 animals than in the control group. Of all anthelmintic-treated animals, only Group 1 lambs did not have a signscantly lower dag weight than controls.
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