Persistent anthelmintic effect of ivermectin in cattle

Loading...
Thumbnail Image

Authors

Swan, Gerry E.
Harvey, R.G.

Journal Title

Journal ISSN

Volume Title

Publisher

South African Veterinary Association

Abstract

The persistent anthelmintic effect of ivermectin given subcutaneously at 200 µg/kg was evaluated against induced infections of Haemonchus placei, Ostertagia ostertagi, Cooperia pectinata, C. punctata, Bunostomum phlebotomum and Oesophagostomum radiatum in cattle. Forty-four Friesian bull calves raised under worm-free conditions were restrictively randomized to one untreated control group and 3 ivermectin treated groups of equal size according to mass. Animals in the different treated groups were treated either 9, 7 or 5 d before infection, which was induced in all animals on the same day. Nine days after treatment the effect of ivermectin was virtually undiminished against O. ostertagi and B. phlebotomum and 7 d after treatment against Cooperia spp. Counts of all worms were reduced by 99% or more following the treatment given 5 d before infection. According to the non parametric method, 80% efficacy in 80% of the treated animals were achieved against all 5 worms up to 7 d after treatment and against O. ostertagi and B. phlebotomum up to 9 d after treatment.

Description

Keywords

Bunostomum phlebotomum, Persistent anthelmintic effect, Ivermectin, Haemoncus placei, Ostertagia ostertagi, Cooperia pectinata, Cooperia punctata, Veterinary helminthology

Sustainable Development Goals

Citation

Swan, GE 1983, 'Persistent anthelmintic effect of ivermectin in cattle', Journal of the South African Veterinary Association, vol. 54 , no. 4, pp. 249-250. [http://www.journals.co.za/ej/ejour_savet.html]