title: Field evaluation of an experimental albendazole pulse release bolus in the control of parasitic gastroenteritis in first-season grazing calves.
abstract: A field experiment is described which evaluates the use of an experimental albendazole pulse release bolus (E-bolus) on gastrointestinal parasitism. The bolus was administered at turnout to 9 first-season grazing calves and 9 animals were kept as controls on separate pasture. Dry summer months accounted for low infection levels in the calves; no cases of parasitic gastroenteritis were observed. The E-bolus introduced at the start of the grazing season provided moderate control of gastrointestinal parasitism. The beneficial effect of the treatment was demonstrated by lower strongyle egg counts and significant differences in ELISA extinctions for Ostertagia, Cooperia and Dictyocaulus. However pepsinogen values were elevated in the bolus-treated group, probably because of the long interval (31 days) between the pulsed treatments. Although not significant there was a trend for the bolus-treated group to gain more weight than the controls.
authors.affiliation: Faculty of Veterinary Medicine, Department of Parasitology, Gent, Belgium.
authors.forename: P
authors.initials: P
authors.lastname: Dorny
authors.forename: J
authors.initials: J
authors.lastname: Vercruysse
authors.forename: H
authors.initials: H
authors.lastname: Hilderson
authors.forename: P
authors.initials: P
authors.lastname: Berghen
authors.forename: K
authors.initials: K
authors.lastname: Van Ommeslaeghe
authors.forename: A
authors.initials: A
authors.lastname: Kloosterman
mesh_terms: D015766:Albendazole; D000818:Animals; D001562:Benzimidazoles / Q000008:administration & dosage / Q000627:therapeutic use*; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology / Q000517:prevention & control*; D005243:Feces / Q000469:parasitology; D005260:Female; D005759:Gastroenteritis / Q000469:parasitology / Q000517:prevention & control / Q000662:veterinary*; D007411:Intestinal Diseases, Parasitic / Q000517:prevention & control / Q000662:veterinary*; D009349:Nematode Infections / Q000517:prevention & control / Q000662:veterinary*; D010270:Parasite Egg Count / Q000662:veterinary; D011897:Random Allocation; D013997:Time Factors; D015430:Weight Gain / Q000187:drug effects
chemical_list: D001562:Benzimidazoles; D015766:Albendazole