Search

Ivermectin (300 micrograms/kg of body weight) was given to swine subcutaneously in the neck to test its efficacy against the kidney worm, Stephanurus dentatus. Two separate field trials were conducted using 146 swine (40 males and 106 females). Urine was obtained before and after treatment and was examined for presence of S dentatus eggs. Stephanurus dentatus eggs were quantitated in positive samples. All treated swine positive for S dentatus eggs in the pretreatment urine samples (n = 54) were negative by 14 to 21 days after treatment with ivermectin. Adverse reactions caused by ivermectin injection were not noticed.

The anthelmintic spectrum of activity and efficacy of flubendazole, using pigs naturally infected with helminth parasites, were determined in 4 experiments, using 157 pigs. Flubendazole (1.5 mg/kg of body weight) mixed in feed or top-dressed on feed for 5 consecutive days was highly effective as an anthelmintic. This dosage level indicated 100% efficacy against mature Ascaris suum, Oesophagostomum dentatum, Trichuris suis, and Metastrongylus apri. There was 88% efficacy against Strongyloides ransomi and 85% efficacy against Stephanurus dentatus and immature Ascaris suum. There was some activity against Globocephalus sp and Macracanthorhynchus hirudinaceus, but insufficient numbers of these parasites were present to make an accurate assessment.