title: Comparative efficacy of clorsulon and albendazole against Fasciola hepatica in cattle.
abstract: In a dosage-confirmation trial, anthelmintic activities of clorsulon and albendazole against Fasciola hepatica were evaluated and compared. Twenty-eight cattle (8 to 12 months old) with natural F hepatica infections were randomly allotted to 4 groups of 7 cattle each: group 1, no treatment (controls); group 2, clorsulon suspension given orally at 3.5 mg/kg of body weight; group 3, clorsulon suspension given orally at 7 mg/kg; and group 4, albendazole paste given orally at 10 mg/kg. At necropsies, performed 7 and 8 days after treatment, control cattle harbored a geometric mean of 133.2 F hepatica, 16.0 of which were immature. Clorsulon administered at 3.5 mg/kg or 7 mg/kg resulted in greater than 99% removal of F hepatica, including immatures. Albendazole treatment resulted in a 76% overall reduction in F hepatica, including a 91% reduction of immatures. Fascioloides magna also were found in the cattle, but neither clorsulon nor albendazole caused significant reductions of the parasite. Adverse reactions to the 2 drugs were not observed.
mesh_terms: D015766:Albendazole; D000818:Animals; D000871:Anthelmintics / Q000494:pharmacology*; D001562:Benzimidazoles / Q000494:pharmacology*; D002417:Cattle; D002418:Cattle Diseases / Q000188:drug therapy / Q000469:parasitology*; D004064:Digestive System / Q000469:parasitology; D005209:Fasciola / Q000187:drug effects; D005210:Fasciola hepatica / Q000187:drug effects*; D005211:Fascioliasis / Q000188:drug therapy / Q000469:parasitology / Q000662:veterinary*; D005260:Female; D008297:Male; D013045:Species Specificity; D013424:Sulfanilamides / Q000494:pharmacology*
chemical_list: D000871:Anthelmintics; D001562:Benzimidazoles; D013424:Sulfanilamides; C015675:clorsulon; D015766:Albendazole