Merck Manual

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Giardia psittaci , Gram stain, parakeet small intestine
Giardia psittaci , Gram stain, parakeet small intestine

Giardia psittaci, 100X. Two pear-shaped organisms are visible in this Gram stain of an impression smear from the small intestine of a parakeet.

Courtesy of Dr. Louise Bauck.