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GIARDIA LAMBLIA

( G. INTESTINALIS)

5/19/16Even Semester 2014

Gastro Intestinal Tract

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Host : human, monkey, rodents, dog, cat

Caused : giardiasis

CosmopoliteInfects nearly 2% of adults and 6% - 8%

of children in developed countries

orldide!" ##% of people in developing countries

have had giardiasis!

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Morphology


Trophozoites :

Peer shaped, rounded anteriorly

dorsally convex and flattened ventral site withsucking disc

size: 1 ! 1" # , with nuclei contain

dense central karyoso$e%ave & pairs flagella arising fro$

axone$a

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'yst


oval, si$e 8 &2 '

Have thin tough all hich the

cytoplasm is characteristically seperated

Have : 2 ( nuclei

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(ife cycle


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Pathogenesis


People infected )y swallowingGiardia cysts fro$ conta$inated

food and waterIncu)ation period : 1 ! weeks

Giardia la$)lia do not invade the

tissue*eed on $ucous secretion

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'linical +y$pto$s


)ild infection : asymptomatic

*iarrhea ith steatorrheic type of stool

+tomach or adominal crampspset stomach or nausea.vomiting

*ehydration /loss of fluids0

Chronic : malasorption syndrome ,failure of vit 1&2 asorption

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Histopathology


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iagnosis


*etection of :tropho$oites in diarrheic stool or

duodenal aspiration

Cyst in formed stool

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Giardia trophozoites stained with trichro$e- 'redit: .ater)orne isease Prevention /ranch, ''


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0pide$iology


elated to individual hygiene andenviron$ent sanitation

Typically $ore prevalent in children-Greater risk are : traveler

2)ackpackers3, $en who have sex

with $en%ealth education play an i$portant

role

6.4. giardia

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