USMLE Forum Archives - USMLE Step 3 - most likely the cause
most likely the cause
meduploader - 05-11-09 12:24
A 50-year-old man is admitted to the hospital with a 3-week history of fever, chills, headache, malaise,
and myalgias. One month before the onset of illness, he returned to the United States from an annual
2-week mission to Mexico, during which he stayed in a small village where he assisted farm workers.
While there, he consumed foods produced locally on the farm, including vegetables, meat products, and
goat's milk. On examination, he is febrile with nontender cervical lymphadenopathy and mild
hepatomegaly. The results of initial laboratory workup are as follows: white cell count, 4,500/μl; hematocrit,
31%; platelet count, 135,000/μl; a slight elevation in hepatic transaminase level (less than twice
the upper limit of normal). A biopsy of one of the lymph nodes reveals noncaseating granuloma formation.
Which of the following organisms is most likely the cause of this patient's illness?
meduploader - 05-11-09 12:24
A 50-year-old man is admitted to the hospital with a 3-week history of fever, chills, headache, malaise,
and myalgias. One month before the onset of illness, he returned to the United States from an annual
2-week mission to Mexico, during which he stayed in a small village where he assisted farm workers.
While there, he consumed foods produced locally on the farm, including vegetables, meat products, and
goat's milk. On examination, he is febrile with nontender cervical lymphadenopathy and mild
hepatomegaly. The results of initial laboratory workup are as follows: white cell count, 4,500/μl; hematocrit,
31%; platelet count, 135,000/μl; a slight elevation in hepatic transaminase level (less than twice
the upper limit of normal). A biopsy of one of the lymph nodes reveals noncaseating granuloma formation.
Which of the following organisms is most likely the cause of this patient's illness?
The correct answer and explanation will be available after you answer.
Page 1
#9
Re: most likely the cause conym5 - 12-29-09 08:58 My answer is: e.
In the acute form (<8 weeks from illness onset), nonspecific and "flu-like" symptoms including fever, sweats, malaise, anorexia, headache, myalgia, and back pain. In the undulant form (<1 year from illness onset), symptoms include undulant fevers, arthritis, and epididymo-orchitis in males.
#26
Re: most likely the cause conym5 - 04-14-10 13:11 Brucellosis continues to be a major zoonosis worldwide. Infection in the United States is highest in people whose occupations bring them into direct contactwith animals or their bodily fluids..
#31
Re: most likely the cause babbu5508 - 09-30-10 08:35 My answer is: e.
febrile with nontender cervical lymphadenopathy and mild hepatomegaly,lymph nodes reveals noncaseating granuloma formation.
Page 1