Each study was designed to ascertain the immediate
and/or long-term efficacy of a collar containing imidacloprid 10% (w/w) and flumethrin 4.5% (w/w) against a
specific ectoparasite or ectoparasites on a group of experimentally infested dogs, compared to an untreated
control group of dogs infested with the same ectoparasite or ectoparasites.