In this issue of Veterinary Clinics: Small Animal Practice, guest editor Dr. Linda Kidd brings her considerable expertise to the topic of Vector-Borne Diseases. To protect companion animal and human health, it is important for veterinary practitioners to have an accurate and current understanding of the geographic distribution, pathophysiology, diagnosis, treatment, and prevention of vector-borne disease, and many recent studies document important changes in all of these factors. In this issue, experts in the field  summarize this information in a succinct, clinically relevant way to help practitioners recognize and prevent these important diseases.