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Am J Vet Res. 1988 Nov;49(11):1986-9.

Effects of milbemycin on adult Toxocara canis in dogs with experimentally induced infection.

American journal of veterinary research

D D Bowman, J C Parsons, R B Grieve, D I Hepler

Affiliations

  1. Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison 53706.

PMID: 3247924

Abstract

To determine the efficacy of a formulation of milbemycins in treating patent infection with Toxocara canis, 8 male and 7 female, 10-week-old, ascarid-free Beagles each were given 125 embryonated eggs of T canis. All dogs developed patent infection within 56 days. On post-infection day 70, the dogs were assigned to 1 of 3 groups of 5 dogs each; members of 1 group were given a placebo, while dogs of the other 2 groups were given either 5.68 or 34.08 mg of the milbemycin formulation, respectively. In both groups of dogs given the drug, the number of eggs passed per gram of feces decreased precipitously. However, a few eggs still were found in the feces of several dogs of each group on the day of necropsy (postinfection day 75). Worms or fragments of worms were passed by the treated dogs from the day of treatment until the day on which necropsy was performed; however, most worms were passed during the first 2 days after treatment. At necropsy, only dogs of the control group were found to harbor adult T canis.

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