Giardia lamblia is a topic covered in the Johns Hopkins HIV Guide.

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  • Protozoan parasite, reservoir primarily human, potentially domestic and sylvatic animals.
  • Most commonly identified fecal parasite in North America
    • Mountainous areas of Northeast, Rocky Mtn states, Northwest
    • Pockets of high prevalence in urban areas and areas of over-crowding
    • Outdoor recreation and swimming pools
  • Fecal-oral transmission via contaminated food, person-to-person, and waterborne outbreaks.

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Last updated: July 31, 2016