Questions and Answers
What is the primary clinical manifestation of intestinal amebiasis?
Abdominal pain and cramping
Which of the following is a characteristic of severe intestinal amebiasis?
Bloody stools
Where are trophozoites of Entamoeba histolytica primarily found?
In the large intestine crypts
Which organ is primarily involved in extraintestinal amebiasis?
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Where are some free-living amebae present, which can be opportunistic human pathogens?
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Which protozoa infection has the highest incidence in tropical and subtropical regions with poor sanitation and contaminated water?
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What is the average prevalence of infection for Entamoeba histolytica in tropical and subtropical regions with poor sanitation and contaminated water?
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Which medication is used to treat acute, fulminating amebiasis caused by Entamoeba histolytica?
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How is infection with Giardia lamblia initiated?
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What method may limit the spread of enteric protozoal infections such as Giardia lamblia in developing countries?
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Study Notes
Intestinal Amebiasis
- Primary clinical manifestation: Diarrhea or dysentery
- Characteristic of severe intestinal amebiasis: Presence of blood and mucus in stool
Entamoeba histolytica
- Trophozoites primarily found: In the large intestine, particularly in the cecum and ascending colon
- Primary organ involved in extraintestinal amebiasis: Liver
Free-Living Amebae
- Found in: Freshwater environments, such as ponds, lakes, and rivers
- Examples of opportunistic human pathogens: Acanthamoeba, Naegleria, and Balamuthia
Epidemiology
- Protozoa infection with the highest incidence in tropical and subtropical regions with poor sanitation and contaminated water: Amebiasis
- Average prevalence of infection for Entamoeba histolytica in these regions: 10%
Treatment
- Medication used to treat acute, fulminating amebiasis caused by Entamoeba histolytica: Metronidazole
Giardia lamblia
- Infection initiation: Ingestion of contaminated food or water containing cysts
- Method to limit the spread of enteric protozoal infections in developing countries: Improving sanitation and providing access to clean water
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Description
Test your knowledge about intestinal and urogenital protozoa, with a focus on amebae including their characteristics, pathogenicity, and impact on human health.
