2pts D Question 1 A 25 yr old man has just returned from a Central American miss

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2pts D Question 1 A 25 yr old man has just returned from a Central American mission with the Peace Corps. He says he is having pain in the upper right region of his abdomen and he has a fever. He claims that he experienced a bloody and mucousy diarrhea about 2 months ago. ACT scan of his abdomen shows an abscess in his liver. Aspiration of material from the abscess was performed. Microscopic examination revealed motile, non-flagellated trophozoites with ameboid movement. What is the likely infectious agent that caused his illness? Giardia lamblia Taenia solium O Entamoeba histolytica Escherichia coli Next No new data to save. Last checked at 10:13am Submit Quiz

Explanation / Answer

Question 1: Entamoeba histolytica as among the options it is the only one which is non flagellated and is known to give bloody stools in the infection causing amoebiasis in humans. The person is suffering from amoebic liver abscess.

Question 2: ingesting a faecally contaminated item. May be he ingested something which had cysts of Entamoebacoming from the stol of infected individual. Only this is the way trophozoites can reach up to the intestine and then the liver.

Question 3: Coccidiodes immitants: This is the fungus which causes infection via spherules. Years after the initial infection the person sometimes acquire Osteomyletis causing damage to spine or meningitis.

Question 4: Inhaled spores. The fungal spores are easily inhaled and when they reach the lungs they transform in to spherules to create the infection.

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