A vectinarian is a veterinarian who specializes in the prevention and treatment of vector-borne diseases, which are illnesses transmitted by vectors such as mosquitoes, ticks, and fleas. They focus on both animal health and public health by monitoring, diagnosing, and managing diseases like Lyme disease and West Nile virus. Additionally, vectinarians may work on developing strategies for vector control and educating pet owners about protecting their animals from these diseases. Their role is crucial in mitigating the impact of these diseases on both animals and humans.