12 Questions
What is the most common involved site of an amoebic liver abscess?
Right lobe
How is Entamoeba histolytica transmitted to gay men?
Via anal-oral transmission
What does anchovy paste consistency describe in relation to Entamoeba histolytica?
Appearance of liver abscess
Which test is represented by a flask in the colon according to the text?
Elisa antigen test
What is the purpose of Paramycin in the context of drugs that work in the lumen of the intestine?
Elimination of amoebic cysts
Why are Erlenmeyer flasks mentioned in the context of Entamoeba histolytica?
To describe colon ulcers
What can cause ulcerations along the colon according to the information provided?
Rust spots
What is the significance of a red stool in relation to Entamoeba histolytica?
Presence of bloody diarrhea
Why is a liver shape mentioned in the context of Entamoeba histolytica?
To describe the appearance of amoebic liver abscesses
What does a puddle with floating red cups represent in terms of diagnostic testing for Entamoeba histolytica?
Presence of cysts or trophozoites in stool samples
How are Erlenmeyer flasks related to Entamoeba histolytica infections?
Represent flask-shaped ulcers in the colon
What is the significance of a sewer pipe without pouches like haustra in the context of Entamoeba histolytica?
Represents causes of intestinal amebiasis
Study Notes
Entamoeba Histolytica
- Entamoeba histolytica causes intestinal amebiasis, which leads to bloody diarrhea (red stool).
Life Cycle
- The parasite has two main life cycle stages:
- Cyst form: ingested from contaminated water, and can be transmitted through anal-oral contact (men drinking water holding hands).
- Liver shape: trophozoite form invades the liver, causing amoebic liver abscess, most commonly in the right lobe (liver shape dig site and hole in right side of liver).
Clinical Features
- Amoebic liver abscess causes right upper quadrant (RUQ) pain, with an enlarged and tender liver (map is a ct scan of liver and a man holding his right upper quadrant).
- The abscess has an "anchovy" paste consistency (anchovy paste truck).
- Intestinal amebiasis causes ulcerations along the colon (rust spots).
- Flask-shaped ulcers can occur in the colon (Erlenmeyer flasks).
Diagnosis
- Stool O&P (puddle with floating red cups) is used to detect cysts or trophozoites, and will contain RBCs.
- An ELISA antigen test or serology can be used for diagnosis (flask in colon).
Treatment
- Metronidazole is an effective treatment for Entamoeba histolytica (Metra).
- Drugs that work in the lumen of the intestine, such as Paromycin (pair of mice near metro), are also used to treat the infection.
Test your knowledge about Entamoeba histolytica through this historical dig themed quiz. Learn about its symptoms, life cycle stages, and common sites of infection like the liver. Explore how this parasite is transmitted and its impact on human health.
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