Studies on the efficacy of four anthelmintics against strongyle infections of sheep in North Sumatra, Indonesia

Studies on anthelmintic efficacy in sheep were carried out on a large breeding farm and on 7 smallholder farms in the North-Sumatra province, Indonesia. The efficacy in reducing strongyle infections in sheep, of albendazole on all farms and of febantel, levamisole and ivermectin on the breeding farm, was estimated by means of faecal egg count reduction tests. High efficacy(>95%) was found with all the anthelmintics tested and on all farms. The results are discussed in relation to the current parasite control programme.