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Giardia lamblia
flagellated protozoan parasite
colonizes and reproduces in the small intestine
causes giardiasis
reproduces via binary fission
EXTRA - Giardiasis does not spread via the bloodstream
Giardia lamblia
Giardia lambliaan anaerobic protozoan parasite commonly found in water sources.
Giardiatransitions through two life stages: trophozoite and cyst.
The trophozoite form of Giardia was first observed in 1681 by Antonie van Leeuwenhoek in his own diarrhea stools.
Life Cycle:
Thetrophozoiteactively dividing, vegetative stage of the protozoan. DiplomonadsFlagella
TheGiardiacyst oval-shaped resistant structure with a very thick wall. These cysts are dormant structures flagella
Transmissioningestion of dormant microbial cysts in contaminated water, food, or by the faecal-oral route (through poor hygiene practices).
Giardia infects humans, but is also one of the most common parasites infecting cats, dogs and birds. Mammalian hosts also include cattle, beavers, deer, and sheep.
Infection Drinking contaminated water fecal-oral route are the most common pathways of entry
Spread via:stool person-to-person transmission is possible
Prevention: boil your drinking water
Symptoms
abdominal cramping diarrhea nausea and vomiting
Diagnosis Fecal matter test Blood test
Treatmentantibiotics:Metronidazole Quinacrine
at least 25 cysts needed to produce an active infection