Giardia

• A genus of protozoan parasites
• Giardia duodenalis: causes a gastrointestinal infection in humans and other animals
  • Many non-human hosts
• Numerous animal-specific species:
  • G. agilis in amphibians
  • G. ardeae and G. psittaci in birds
  • G. microti in muskrats and voles
  • G. muris in rodents