Case Presentation: A 58-year-old man with a history of Lyme disease was diagnosed with babesiosis two weeks earlier, confirmed by positive Babesia Polymerase Chain Reaction (PCR), and treated with a 10-day course of azithromycin and atovaquone. He returned with fatigue and exertional dyspnea, and labs indicated worsening pancytopenia. Suspecting hemolysis and bone marrow suppression from [...]