usmle123
Forum Senior
Topics: 20
Posts: 43
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22-year-old male comes to the emergency department with severe abdominal pain and diarrhea for last two days. The pain is continuous, located in his right lower quadrant, and non-radiating. His stools are loose, bloody, and mucoid. He ate a chicken burger from a local restaurant three days ago. His pulse is 88/min, blood pressure is 116/78 mm Hg, respirations are 14/min, and temperature is 37.3 c (99F). Abdominal examination reveals tenderness in the right iliac fossa, but there is no rigidity or rebound tenderness. Stool examination shows numerous white blood cells and red blood cells. What is the most likely etiological agent of this patient’s diarrhea?
a.Campylobacter jujuni
b.Enterohemorrhagic E. coli
c.Vibrio cholera
d.Shigella
e.Yersinia enterocolitical
Can anyone tell me why the answer is not b. enterohemorragic e. coli? (the correct answer is a)
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| star1
Forum Guru
Topics: 93
Posts: 827
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You see this is the case of INFECTIOUS BLOODY DiRRHOEA
look at the last line of the Q
What is the most likely etiological agent of this patient’s diarrhea?
so what is the most likely cause of infectious bloody dirrhoea?
its Compylobacter in USA
Ecoli is the one of cause but its not the most common cause
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| zianab
Forum Elite
Topics: 17
Posts: 282
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GOOD EXPLANATION STAR 1.KEEP UP THE GOOD WORK!!!!
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| IceAge
Forum Senior
Topics: 21
Posts: 159
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The explaination given by Star1 is good.
The reason for "why not EHEC ?" is that EHEC is not invasive ... you will lots of RBCs and very few WBCs with EHEC.
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| usmle123
Forum Senior
Topics: 20
Posts: 43
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Hi, star1 and iceage, both of you gave good explanations, thanks a lot
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