Skip to main content

Giardiasis is a diarrheal disease caused by a tiny parasite. A person or animal can become infected and pass the parasite in their stool (poop). Giardia spreads very easily and humans or animals can become infected if the parasite is swallowed such as consuming contaminated water or food, or having close contact with someone who has giardiasis.


For information on how to report a disease click here. For any questions, please contact the appropriate health authority by phone or review the website for additional information.

Carson City, Douglas and Lyon Counties
Carson City Health & Human Services (CCHHS)
(775) 887-2190

Clark County
Southern Nevada Health District (SNHD)
(702) 759-1300

Washoe County
Washoe County Health District (WCHD)
(775) 328-2447

All Other Counties
Nevada Division of Public and Behavioral Health (DPBH)
(775) 400-0333