|Giardia cell, SEM|
Giardia lamblia (synonymous with Lamblia intestinalis and Giardia duodenalis) is a flagellated protozoan parasite that infects the gastrointestinal tract and causes giardiasis or 'beaver fever'. Giardia affects humans, but is also one of the most common parasites infecting cats, dogs and birds. Mammalian hosts also include cows, beavers, deer, and sheep.
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