Effect of parasitism with Ostertagia circumcincta on pharmacokinetics of fenbendazole in sheep

Vet Parasitol. 1985 Mar;17(3):239-49. doi: 10.1016/0304-4017(85)90036-6.

Abstract

Plasma and abomasal fluid concentrations of fenbendazole and its two major metabolites in sheep experimentally infected with Ostertagia circumcincta were compared with those in the same sheep when non-parasitised. Bio-availability of the drug was reduced in the parasitised state. There was also a reduction in the proportion of drug present in the form of metabolites in parasitised as compared with non-parasitised animals.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Abomasum / metabolism
  • Animals
  • Benzimidazoles / metabolism*
  • Biological Availability
  • Fenbendazole / blood
  • Fenbendazole / metabolism*
  • Fenbendazole / therapeutic use
  • Hydrogen-Ion Concentration
  • Kinetics
  • Ostertagiasis / blood
  • Ostertagiasis / drug therapy
  • Ostertagiasis / metabolism
  • Ostertagiasis / veterinary*
  • Pepsinogens / blood
  • Sheep / parasitology
  • Sheep Diseases / blood
  • Sheep Diseases / drug therapy
  • Sheep Diseases / metabolism*
  • Sulfones / metabolism
  • Trichostrongyloidiasis / veterinary*

Substances

  • Benzimidazoles
  • Pepsinogens
  • Sulfones
  • Fenbendazole
  • oxfendazole