Page 29 - Medical Parasitology_ A Textbook ( PDFDrive )
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Giardia lamblia 21
2
d
Contamination of water, food, or
hands/fomites with infective cysts.
Trophozoites are also
passed in stool but
they do not survive in
the environment.
1
i = Infective Stage i
d
d = Diagnostic Stage d Cyst
3 4 5
Trophozoites
Cyst
Fig. 4.2 Life cycle of Giardia lamblia (Reproduced from https://www.cdc.gov/dpdx/giardiasis/
index.html)
3. Molecular diagnosis
PCR on stool specimen.
Treatment
Metronidazole (250 mg 3 times daily for 5 days) or tinidazole is the drug of choice.
Paromomycin can be given to symptomatic pregnant woman.