The activity against fleas starts immediately after the collar is applied. Protects against development of flea larvae in the immediate vicinity of the animal for 10 weeks. Seresto can be used as part of a treatment strategy against Flea Allergy Dermatitis (VAD). The product has persistent acaricide (killing) efficacy (Ixodes ricinus, Rhipicephalus turanicus) and repellent (anti-nutritive) dysfunction (Ixodes ricinus) for 8 months. It works against larvae, nymphs and adult signs. It is possible that the sign that was already present on the cat before treatment, will not be killed within 48 hours after the collar is attached and attached and visible. Therefore, it is recommended to remove the sign that is already on the cat at the time of application. The prevention of infections with new sign starts within the two days after the collar is applied.