| 摘要 |
Collar or other external device for a pet, in particular a cat or dog, made of a matrix in which is incorporated from 0.1 to 40% by weight, preferably from 1 to 15% by weight, relative to the collar, of a substance which is active against ectoparasites such as fleas and ticks, this active substance being formed of at least one compound corresponding to formula (I) below: this collar or other external device being designed to ensure more than 6 months of efficacy against fleas and more than 3 months of efficacy against ticks, the efficacy being maintained for several weeks even if the collar or other external device is taken off or lost or if there is a variation in the release of the compound.
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