EFFICACY OF DORAMECTIN AGAINST INTESTINAL NEMATODES AND SARCOPTIC MANGE MITES IN NATURALLY INFECTED SWINE

Endectocidal efficacy of doramectin administered intramuscularly at a dosage of 300 mu g/kg was evaluated in 464 pigs naturally infected wit h intestinal nematodes or mange mites on 14 commercial farms in Japan. By doramectin treatment, fecal egg counts were reduced >99% for Ascar is suum, Strongyloides ransomi, Oesophagostomum dentatum, and Trichuri s suis; worm counts of T. suis and mite counts of Sarcoptes scabiei we re reduced 90.1% on Day 21 and 99.5% on Day 28 following treatment, re spectively.