Article: Newsday, Melville, N.Y., Animal House column.

Byline: Denise Flaim

Jul. 10--It's not just ivermectin anymore. Most dog-savvy people -- not to mention their vets -- know about the connection between collies and invermectin. These herding dogs have a heritable sensitivity to the anti-parasitic drug, which can overwhelm the blood-brain barrier, causing neurotoxicity, coma and, sometimes, death. In 2001, veterinarian Katrina Mealey of Washington State University College of Veterinary Medicine in Pullman, Wash., and her team found that ivermectin sensitivity is caused by a mutation in the multi-drug resistance gene (MDR1), which controls a protein that helps pump drugs and toxins out of the brain.

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