Giardia lamblia

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Giardia lamblia
Giardia cell, SEM
Scientific classification
Domain: Eukaryota
Phylum: Metamonada
Order: Diplomonadida
Binomial name
Giardia lamblia
Parasite life cycle (click to enlarge).

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.