Antiparasitic resistance

Scientific experts have identified changes in parasitic infections (relating to parasite genetics, biology, and robustness as well as management of these parasites) and increased parasiticide resistance that are of immediate and emerging concerns in many species. These changes are affecting the health and productivity of animals, requiring veterinarians and animal owners to reexamine strategies, programs, and drug choices for parasite evaluation and control. The AVMA strongly recommends that veterinarians in concert with clients use the most up-to-date guidelines, treatments, and evidence-based medicine for parasite control. Veterinarians should lead the decision-making process for the judicious use of antiparasitic drugs in animals regardless of the distribution channels through which the antiparasitic drugs were obtained.

The geographical extent of parasite species with documented parasiticide resistance varies greatly and treatment strategies should be guided by local conditions, experience and antiparasitic drug sensitivity studies when possible. Diagnosis of the presence of parasiticide resistance is still challenging. Education and research efforts in the field of parasitology are needed to provide the most up-to-date knowledge to veterinarians, veterinary students, and animal owners; this knowledge should include parasite life cycles, diagnostic evaluations, management strategies, and treatment and control measures. In developing a parasite control program, veterinarians can obtain specific information from multiple sources including, but not limited to, species and specialty groups, government agencies, and other experts.