Plasmodium spp. exoerythrocytic stage (liver stage).  The field is filled with hepatic cells and the two large dark blue cells are infected.  It is easier to locate these while scanning under low power and then changing objectives, ultimately to oil rather than randomly searching under oil.  100x
 

Plasmodium spp. exoerythrocytic stage (liver stage).  The individual cells within this infected liver cell are cryptozoites.  When sporozoites are injected with the bite of the mosquito, they first travel to the liver and multiply in this form before entering the bloodstream and infecting RBCs. 1000x