Giardia, parasite causing giardiasis From http://www.epa.gov/nerlcwww/giardia.htm Image by : H.D.A. Lindquist, U.S. EPA

The same Giardia lamblia (intestinalis) cyst as imaged at different instrument settings by confocal microscopy. (A) is the cyst imaged by transmission (differential interference contrast), only. (B) is the cyst wall selectively imaged through use of fluorescent-labelled (TRITC) antibody that is cyst wall specific. (C) is the cyst imaged through use of carboxy fluorescein diacetate, a viability stain. (D) is a composite image of (B) and (C). (E) is a composite image of (A), (B), and (C). Bar = 10 microns.

Source: Gerbil stool.

Method: Confocal Microscopy

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