Dr. Johnston earned her B.S. in Microbiology and Veterinary Sciences from the University of Arizona and her D.V.M. from Tufts University School of Veterinary Medicine. She completed her residency in Small Animal Internal Medicine at Cornell and earned her Ph.D. in Molecular Biology from UT Southwestern in Dallas. Dr. Johnston is currently an assistant professor at LSU School of Veterinary Medicine, where she is investigating the role of mitochondrial membrane protein PGAM5 in hepatocellular carcinoma. Her clinical interests are canine and feline hepatobiliary disease.