Fever in a visitor to Canada: a case of mistaken identity.

We report a case of babesiosis in a traveler from India who was diagnosed with malaria on the basis of blood smears. Pan-Plasmodium PCR was positive, though species-specific assays were negative. Reexamination of blood smears and Babesia-specific PCR confirmed babesiosis. We highlight the overlapping clinical and diagnostic features of malaria and babesiosis and the potential cross-reactivity of Plasmodium primers in cases of babesiosis.