Why do fleas sometimes persist in an environment even when you think you and your client are doing everything right? The answer likely lies in a firm understanding of how flea control products work. Many veterinarians and technicians have told me thattoday's veterinarian-recommended flea control products may not be controlling some flea infestations as well as in the past. Practitioners have asked whether resistance could be a cause. Although resistance is theoretically possible, it is more likely that product failures result from factors other than resistance, such as ecological fluctuations and natural disasters, naturally occurring differences in flea susceptibility, client compliance issues, and lack of client education. Whatever the cause, flea control problems are occurring, and veterinarians must provide their patients with relief from flea infestations. In this article, I suggest ways to help you identify and address compliance factors often responsible for persistent flea infestations.
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