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Pathogenic Parasites
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A traveler developed diarrhea 2 weeks after returning from a trip to Moscow and St. Petersburg, Russia. The diarrhea has lasted for over 3 weeks and his stools are greasy and foul-smelling. Which of the following is the most probable etiologic agent?
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A 45-year-old African man suffers from chronic fatigue and weakness. At a routine examination at his village clinic he was found to be profoundly anemic. Which of the following agents is most likely to be responsible?
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A. Diphyllobothrium latum
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B. Strongyloides stercoralis
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D. Enterobius vermicularis
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An Indonesian man has vague complains of epigastric pain and abdominal tenderness. An evaluation for a peptic ulcer was negative. A diagnosis of strongyloidiasis has been suggested. The best way to confirm this diagnosis is:
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A. Finding eggs in the feces
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B. Finding adult worms in the feces
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C. Finding larval worms in the feces
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D. X-ray evidence of pneumonia
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A man who moved to the United States from Ethiopia 10 years ago has been well but over the past year has lost significant weight. He reports a healthy appetite and no change in his food consumption. If he has a tapeworm, it was acquired by ingesting tissue containing:
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C. Copepods (crustaceans)
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A child presents with a prolapsed rectum, a history of diarrhea and a fondness for eating dirt. She is anemic and looks malnourished. A stool examination reveals barrel-shaped eggs with “plugs” at either end. She is most likely infected with:
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B. Enterobius vermicularis
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E. Strongyloides stercoralis
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