The present disclosure provides methods for treating or preventing diseases caused by arthropod-borne parasites by administration of a protein kinase inhibitor to a mammalian subject infected with or at risk of exposure to an arthropod-borne parasite. In some aspects, the therapeutic and prophylactic regimens of the present disclosure are effective in reducing parasite development in arthropods feeding on recipients of the regimens. Additionally, the present disclosure provides methods for screening candidate anti-parasitic agents.