The efficacy of strategic treatments with ivermectin pour-on against trichostrongylid and lungworm infections in first year grazing calves in northern Germany.
{"title":"The efficacy of strategic treatments with ivermectin pour-on against trichostrongylid and lungworm infections in first year grazing calves in northern Germany.","authors":"T Schnieder, S Wheeler","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>Three groups of 8 first year grazing calves each were either left untreated as controls (group 1), or were treated with 10 mg levamisole spot-on/kg bodyweight (group 2) or with 0.5 mg ivermectin pour-on/kg bodyweight 3, 8, and 13 weeks after turnout (group 3), respectively. Egg counts, herbage larval counts, worm counts of tracer calves, pepsinogen concentrations and weight gains showed a high efficacy of the strategic treatment in group 3 against gastrointestinal nematodes. The calves of group 1 and 2 developed clinical signs of parasitic bronchitis whereas the group 3 animals remained clinically healthy. The strategic treatment with ivermectin cleaned the respective pasture from infective lungworm larvae.</p>","PeriodicalId":75492,"journal":{"name":"Angewandte Parasitologie","volume":"32 4","pages":"185-92"},"PeriodicalIF":0.0000,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Angewandte Parasitologie","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
Three groups of 8 first year grazing calves each were either left untreated as controls (group 1), or were treated with 10 mg levamisole spot-on/kg bodyweight (group 2) or with 0.5 mg ivermectin pour-on/kg bodyweight 3, 8, and 13 weeks after turnout (group 3), respectively. Egg counts, herbage larval counts, worm counts of tracer calves, pepsinogen concentrations and weight gains showed a high efficacy of the strategic treatment in group 3 against gastrointestinal nematodes. The calves of group 1 and 2 developed clinical signs of parasitic bronchitis whereas the group 3 animals remained clinically healthy. The strategic treatment with ivermectin cleaned the respective pasture from infective lungworm larvae.
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