Animal & Veterinary

Antiparasitic Resistance

The Ruminant and Equine Antiparasitic Drug Use and Antiparasitic Resistance Survey is now open! FDA’s Center for Veterinary Medicine encourages all bovine, equine, and small ruminant veterinarians and veterinary parasitologists to participate. The survey is intended to help the center better understand the level of awareness and concern within the veterinary community regarding antiparasitic resistance in grazing species. The survey will be open for five weeks, from September 29, 2015, to November 3, 2015. Responses will directly impact future educational outreach efforts to encourage the sustainable use of approved antiparasitic drugs and various strategies to slow the development of resistance.

The following professional veterinary groups will distribute the survey link to their members through online materials:

  • American Association of Bovine Practitioners (AABP)
  • American Association of Equine Practitioners (AAEP)
  • American Association of Small Ruminant Practitioners (AASRP)
  • American Association of Veterinary Parasitologists (AAVP)
  • American Veterinary Medical Association (AVMA)

If you’re a bovine, equine, or small ruminant veterinarian or a veterinary parasitologist but not a member of one of the above five groups, please email Rita Viskup at for the survey link.

What is antiparasitic resistance?

Antiparasitic resistance is the genetic ability of parasites to survive treatment with an antiparasitic drug that was generally effective against those parasites in the past. After an animal is treated with an antiparasitic drug, the susceptible parasites die and the resistant parasites survive to pass on resistance genes to their offspring.

Antiparasitic resistance poses a significant threat to animal health and can result in production losses in food-producing species. Researchers have documented antiparasitic resistance in grazing species, such as cattle, small ruminants (sheep and goats), and horses, both globally and within the United States.

Many factors contribute to antiparasitic resistance, including the biology of the parasite; the immune status of the host animal; treatment practices; drug properties; and certain livestock management practices.

What is FDA’s Center for Veterinary Medicine doing about antiparasitic resistance?

To help combat this emerging problem, the FDA’s Center for Veterinary Medicine started the Antiparasitic Resistance Management Strategy (ARMS). The strategy promotes sustainable use of approved antiparasitic drugs in cattle, small ruminants, and horses. Sustainable use will help ensure that antiparasitic drugs remain effective for as long as possible, thereby slowing the development of antiparasitic resistance in grazing species in the United States.

Page Last Updated: 09/29/2015
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