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Parasite Basics and Deworming

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Deworming horses is more complicated today that it was a few years ago, as researchers have revealed growing concerns about parasite resistance and the need for individualized dewormer regimens.

About the Experts

Martin Krarup Nielsen, DVM, PhD, Dipl. EVPC

Martin Krarup Nielsen, DVM, PhD, is an assistant professor appointment in parasitology at the University of Kentucky's (UK) Maxwell H. Gluck Equine Research Center in Lexington.

Wendy E. Vaala, VMD, Dipl. ACVIM

Wendy E. Vaala, VMD, Dipl. ACVIM, is a senior equine technical services veterinarian at Merck Animal Health and specializes in internal medicine and equine neonatology and perinatology. Prior to joining Merck Animal Health in 2004, Vaala was an assistant professor in large animal medicine at New Bolton Center, where she helped develop the neonatal intensive care unit (NICU) and high-risk pregnancy program. After leaving academia, Vaala served on the staff of Mid-Atlantic Equine Medical Center and BW Furlong and Associates in New Jersey, where she started NICUs, foaling programs for mares with high-risk pregnancies, and medicine referral services at both practices. She is board certified in large animal internal medicine and an active member of the American Association of Equine Practitioners. She has been an invited lecturer at seminars and symposiums for horse owners and veterinarians in North and South America, Australia, and Europe. She also has authored articles for veterinary journals and is an assistant editor for the textbook Equine Reproduction.

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