This presentation provides an overview of tick- and mosquito-transmitted infections and current diagnostics and what to do with a positive result. • Improving canine care through better understanding of canine heartworm infection. • Exhibit a better understanding of canine Lyme disease. Discuss Lyme seroprevalence and pathogenesis. • Gain an understanding of the prevalence of canine ehrlichiosis. • Improve canine care through better understanding of canine heartworm infection. Exhibit an understanding of the prevalence of canine anaplasmosis. • Explain the health impact of more than one vector-borne infection in the dog. Understand the clinical presentation of coinfection with multiple vector-borne pathogens. • Understand the benefits of PCR and serology for sick patients.