Two groups of 9 ten-month-old heifers (groups 1 and 2) were treated with albendazole at 7.5 mg a.i./kg body-weight and another 2 groups (3 and 4) received fenbendazole at 7.5 mg a.i./kg. 30 seconds before receiving the anthelmintic, groups 2 and 4 were drenched with 60 ml NaHCO3 to stimulate the...

In Victoria, Australia, worm-free heifers were experimentally infected with larvae of Ostertagia ostertagi and Cooperia spp. that had been chilled to induce inhibition. After 21 days they were treated with fenbendazole (7.5 mg/kg bodyweight) or thiabendazole (88.0 mg a.i./kg) or left untreated. 7...

In autumn, experimental animals were drawn from three herds that had grazed pasture during the previous winter and spring. One herd of two-year-old steers had had ostertagiasis during that period. The other two herds, one of three-year-old heifers and one of ten-month-old weaners, were apparently...

18-month-old cattle were slaughtered during December 1983 and 1984 to determine final nematode counts. 8 of these animals in 1983 and 12 in 1984 were given albendazole at 7.5 mg/kg and retained in yards 10 days prior to slaughter. Compared to the untreated group, there were significant reductions...

In field trials in 1983-84, Hereford weaner steers were given no anthelmintic treatment or were treated with morantel slow release bolus, pour-on levamisole or albendazole orally. Nematode egg counts in faeces were generally <50/g, indicating low numbers of adult nematodes. Treatment significantly affected mean faecal egg count, those for controls and morantel being 16 and 10/g above the overall mean (47/g) and levamisole and albendazole 6 and 12/g below the mean. There were no significant differences between treatments in numbers of larvae on pasture. At the end of both years most nematodes were early 4th stage larvae of O. ostertagi. There were no significant differences in nematode counts or...