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A 32-year-old man complains of fever, diarrhea, and abdominal pain. He has had intermittent fevers for the past month, with episodes of bloody diarrhea. The abdominal pain started 2 weeks ago, and since that time he has had fewer episodes of diarrhea. He denies any jaundice, pale stools, or IV drug use. The patient emigrated from Mexico 6 months ago, and has been living with his extended family in Arizona. On examination, there is hepatomegaly with tenderness to palpation over the liver. An abdominal ultrasound reveals a well-defined hypoechoic mass. What is the most likely pathogen responsible for this patient's symptoms?Ask StudybuddyGroup of answer choicesCandida albicansSalmonella typhiCoccidioides immitisKlebsiella pneumoniaeEscherichia coliCampylobacter jejuniDiphyllobothrium latumEntamoeba histolytica

Question

A 32-year-old man complains of fever, diarrhea, and abdominal pain. He has had intermittent fevers for the past month, with episodes of bloody diarrhea. The abdominal pain started 2 weeks ago, and since that time he has had fewer episodes of diarrhea. He denies any jaundice, pale stools, or IV drug use. The patient emigrated from Mexico 6 months ago, and has been living with his extended family in Arizona. On examination, there is hepatomegaly with tenderness to palpation over the liver. An abdominal ultrasound reveals a well-defined hypoechoic mass. What is the most likely pathogen responsible for this patient's symptoms?Ask StudybuddyGroup of answer choicesCandida albicansSalmonella typhiCoccidioides immitisKlebsiella pneumoniaeEscherichia coliCampylobacter jejuniDiphyllobothrium latumEntamoeba histolytica

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Solution

The most likely pathogen responsible for this patient's symptoms is Entamoeba histolytica. This is a parasite that causes amebiasis, which can lead to symptoms such as fever, diarrhea, and abdominal pain. The patient's history of emigration from Mexico and the presence of a liver abscess (suggested by the ultrasound finding of a hypoechoic mass in the liver) are also consistent with this diagnosis. E. histolytica is endemic in many parts of Mexico, and liver abscesses are a common complication of amebiasis.

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