Giardia Information: Reliable Resources from CDC, Mayo Clinic & NIAID

* The Centers for Disease Control and Prevention (CDC) website has a wealth of information about Giardia, including symptoms, diagnosis, treatment, and prevention.

* The Mayo Clinic website also has a helpful page on Giardia, which provides information about the parasite, how it is spread, and how to treat it.

* The National Institute of Allergy and Infectious Diseases (NIAID) website has a fact sheet on Giardia that provides basic information about the parasite and how to avoid it.

* The World Health Organization (WHO) website has a page on Giardia that provides information about the parasite, its prevalence, and how to prevent it.