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Entamoeba histolytica
- Lytic effects on tissues
- Other species of amoeba are commensals only
Amoebiasis
- 50 million cases / year
- Important cause of mortality in tropical countries
- World-wide distribution
- Faecal-oral route or STD
- Commonest in areas of poor sanitation
- Cysts
- excreted for long periods by aymptomatic carriers
- may survive for weeks
Clinical features
- Intestinal, non-invasive form
- Invasive intestinal
- Ulceration
- Colitis
- Bloody diarrhoea
- Abdo pain
- Amoeboma
- Extra-intestinal
- Liver abscess
- lung abscess
- brain abscess
Diagnosis
- Hot stool for amoeba
- Formol-ether concentration of stool for cysts
- Serology
Treatment
Prevention
- Boil water
- Cook vegetables
- Safe sex
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