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Image of the Week for August 3, 2009

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Giardia intestinalis Infections (Giardiasis)

Giardia intestinalis Infections (Giardiasis). Three trophozoites of Giardia intestinalis (A, trichrome stain. B and C, iron hematoxylin stain). Each cell has 2 nuclei with a large, central karyosome. Cell length: 9 to 21 µm. Trophozoites are usually seen in fresh diarrheal stool or in duodenal mucus.

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