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[Toxoplasma gondii]

Tachyzoites (trophozoites) of Toxoplasma gondii are approximately 4-8 µm long by 2-3 µm wide, with a tapered anterior end, a blunt posterior end and a large nucleus.  They may be found in various sites throughout the body of the host.

A

A:  Toxoplasma gondii tachyzoites, stained with Giemsa, from a smear of peritoneal fluid obtained from a laboratory-inoculated mouse.