Microbiology case

Nicole Amsterdam is a 20-year-old woman who underwent a splenectomy in 2000 after an MVR resulted in splenic rupture.She resceived vaccination against pneumococcos and H.influenzae.She has been visiting India and presents with high fever to 105 F,shaking chills,and rigors.She is quite pale.Laboratory returns and shows a severe hemolytic anemia.You suspect aparasite.

What is the best way to diagnosis her infection?

A/Blood culture
B/Thck and thin blood smears
C/Urine culture
D/Stool culture
E/CT scan of the head to look for cysts