Giardiasis is caused by a protozoan parasite.
Giardiasis, an intestinal infection, is caused by Giardia duodenalis (also referred to as Giardia lamblia or Giardia intestinalis), which is an anaerobic protozoan parasite. This microscopic parasite attaches to the lining of the small intestine in humans and other mammals. Once attached, it interferes with nutrient absorption, leading to various gastrointestinal symptoms. The life cycle of Giardia involves two forms: trophozoites (the active, feeding form) and cysts (the infectious, dormant form). Humans typically become infected by ingesting Giardia cysts in contaminated water, food, or surfaces.
Here's a breakdown:
- Pathogen Type: Protozoan parasite
- Specific Parasite: Giardia duodenalis (synonyms: Giardia lamblia, Giardia intestinalis)
- Mechanism: Attaches to the small intestine lining and interferes with nutrient absorption.
- Infectious Form: Cysts
Giardiasis, therefore, is a parasitic infection caused by a protozoan.
