Studies on the efficacy of Fipronil against ectoparasites - II. Tick control

The results of sixteen studies on the effects of Fipronil (Frontline(R) Spr ay and Spot on) against tick infestations are presented. Effective tick con trol was observed in dogs for at least five weeks after treatment with the splay preparations and for at least three weeks with the "Spot on" preparat ion. For cats with tick infestations, both preparations resulted in effecti ve tick control for two weeks after a single treatment. Weekly immersion in water of treated dogs does not affect the duration of the efficacy of this treatment, but shampooing reduces the beneficial effect to one to thr ee w eeks. Fipronil kills ticks before the risk of transmission of borrelia is h igh. The spectrum of activity of Fipronil includes Ixodes ricinus, Rhipicep halus sanguineus and a number of other tick species.