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Protozoan
Host Cell
Pigment Present
Merogony in Blood
Plasmodium
RBC
Yes
Haemoproteus
No
Leucocytozoon
RBC or WBC; distorted and enlarged often beyond recognition
Isospora
WBC; in nuclear indentation
Noa
Hepatozoonb
WBC, large, elongated oval shape
Babesiab
Noc
a Multiple intracellular parasites may be seen in acute infections.
b Uncommon to rare.
cBabesia are pyriform and may be in a V, X, or fan pattern.
