Giardia lamblia


Standard Precautions

General Information

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.

  • Reactive arthritis

  • Irritable bowel syndrome

  • Recurring diarrhea

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.

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