[Elizabeth_Zeibig]_Clinical_Parasitology__A_Practi(z-lib.org)

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CHAPTER 6 Select Sporozoa: Plasmodium and Babesia
A
B
a
b
C
D
E
FIGURE 6-3 Plasmodium vivax composite consisting of the
following. A, Ring form. B, Ring form with Schüffner’s dots.
C, Immature (a) mature (b) schizonts. D, Schizont (note
Schüffner’s dots). E, Mature schizont (Giemsa stain, ×1000).
Macrogametocytes. The average P. vivax
macrogametocyte is characterized by round to
oval homogeneous cytoplasm and an eccentric
chromatin mass, often located against the edge
of the parasite. Diffuse, delicate, light brown
pigment may be visible throughout the parasite.
Other Morphologic Characteristics. Red blood
cells infected with P. vivax tend to become
enlarged and distorted in response to the presence
of the growing parasites. The morphologic
forms of P. vivax, with the exception of early
ring forms that are less than 8 to 10 hours