Protozoa home Anaplasma Marginale Babesia Bigemina Babesia Bovis Cryptosporidium oocyst Eimeria oocyst Giardia sp Isospora sp Sarcocystis sp Theileria buffeli Trichomonads Trypanosoma theileri Tick fever comparison Anaplasma Marginale a RICKETTESIA - not a protist Third most common agent of bovine tick fever in Australia Note the dense, dark blue to purple dots on or close to the margin of the erythrocytes (they can be surrounded by a faint halo)