Flagellated protozoan parasite, also known as G. duodenalis and G. intestinalis.
Transmission through ingestion of cysts in contaminated water, food or by the fecal-oral route.
Incubation of about 7 days, symptoms normally begin 1-3 weeks after becoming infected.
Irritable bowel syndrome
Diagnosis of multiple stool specimens increase test sensitivity. PCR panel is the most sensitive and can be used to identify subtypes of Giardia.
CDC. Parasites - Giardia. February 26, 2021. https://www.cdc.gov/parasites/giardia/infection-sources.html