No evidence of Levamisole resistance in Ascaridia galli on a freerange egg farm in Australia

Abstract

With the growing popularity of free range production systems, the incidence of helminth infections has increased in commercial poultry farms in Australia. Adequate control can only be maintained by regular application of commercial anthelmintics. Until very recently, levamisole (LEV) and piperazine (PIP) were the only registered chemicals to treat nematode infections in chickens with no published appraisal of their efficacy status since registration. We report the first formal investigation into the efficacy of commercial anthelmintics against chicken ascaridiasis in Australia.