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Image of the Week for May 19, 2008

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Blastocystis hominis Infections

Blastocystis hominis Infections. A, B, C, D: B hominis cyst-like forms (trichrome stain). The sizes vary from 4 to 10 µm. The vacuoles stain variably from red to blue. The nuclei in the peripheral cytoplasmic rim are clearly visible, staining purple, in B (4 nuclei). Specimens in Figures A, B, and C contributed by Ray Kaplan, MD, SmithKline Beecham Diagnostic Laboratories, Atlanta, GA.
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