Plasmodium spp. and Borrelia burgdorferi co-infection associated with antiphospholipid syndrome in a returned traveler: a case report.

The differential diagnosis of fever in a returned traveler is wide and challenging. We present a case of a patient working in Africa, who returned with fever, constitutional symptoms, headache, and blurred vision. An initial diagnosis of malaria was made, and additional workup revealed Borrelia burgdorferi co-infection and antiphospholipid syndrome.