histolytica Classification Protozoan Rhizopod Host Homo sapiens Transmission Faecaloral alimentary Infective stage Mature cyst Localisation Large intestine ID: 912243
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ENTAMOEBA HISTOLYTICA
Slide2Entamoeba
histolytica
Classification:
Protozoan-
Rhizopod
Host
:
Homo
sapiens
Transmission
:
Faecal-oral
(alimentary
)
Infective
stage:
Mature cyst
Localisation
:
Large intestine
Slide3Entamoeba
histolytica
Pathogenicity
:
1)
Intestinal
amoebiasis
(Amoebic
dysentery):
formation of
ulcers
of the wall of the intestine, acute or chronic diarrhoea, stool containing blood and mucus; may be asymptomatic infection.
2)
Extra- intestinal
amoebiasis
:
abscess of liver, lung, brain, skin.
Laboratory diagnosis:
Fresh stools are examined under the microscope. E.
histolytica
(
cysts
with 4 nuclei) can be demonstrated in the stools
Slide4Life cycle
Cyst:
infective stage
Inters mouth through contaminated food, drink, fly, or through using human stool as fertilizer
To L.I. lumen and change into trophozoite
(pathogenic stage)
Produce lytic enzymes (capable of doing lysis and produce ulcer)
Flask shape ulcer
Can do erosion through B.V. to liver and other organs
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