Parasite Flashcards
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2
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Giardiasis Life Cycle and Transmission
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Giardiasis Life Cycle and Transmission
Giardia lamblia
Cysts spread by the fecal-oral route
- Food or water supplies
- person-to-person
- One animal reservoir: ‘Beaver fever’ •
Common in campers, groups of children, travelers returning from abroad
Prevalence in the developing world may be as high as 10%.
Cysts
- survive more than 2 months in cold water
- resistant to chlorine
3
Q
Giardiasis Diagnosis
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Giardiasis Diagnosis
O&P; microscopy
- Cysts: 11-14 µm, oval, 4 nuclei
- Trophs: 12-15 µm, pear-shaped, 2 nuclei
Antigen detection
Trophozoites may be obtained using the Enterotest kit or by duodenal aspiration, and detected in wet mounts
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