Inhibition of immature Ctenocephalides felis felis (Siphonaptera: Pulicidae) development in the immediate environment of cats treated with imidacloprid.

The hypothesis that dermally applied imidacloprid may transfer from treated cats, Felis catus L., to their immediate environment in quantities sufficient to have a significant effect on developing immature cat fleas, Ctenocephalides felis (Bouché), was tested in a controlled experiment. Flea eggs harvested from untreated donor cats were incubated on replicated samples from blankets used by treated or untreated cats under standardized conditions.

Field study on the insecticidal efficacy of Advantage against natural infestations of dogs with lice.

A clinical field trial was performed to evaluate the efficacy of imidacloprid, the active ingredient of Advantage 10% Spot-On, against natural lice infestations on dogs. Imidacloprid was highly effective against both sucking (Linognathus setosus) and biting (Trichodectes canis) lice over the 6-week period of the trial. The duration of efficacy exceeded the egg-to-imago development period of both lice.