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Which Bug is causing this bronchopneumonia? Which Bug is causing this bronchopneumonia?
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  #1  
Old 09-27-2010
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Bacteria Which Bug is causing this bronchopneumonia?
A 20-year-old man from Queensland, Australia, has developed severe bronchopneumonia. His medical history is remarkable for cystic fibrosis and frequent hospitalizations caused by bacterial pneumonia. A sputum culture on blood and Ashdown media reveal wrinkled colonies that are oxidase positive. Gram staining shows gram-negative, bipolarly staining rods that resemble safety pins. What is the most likely diagnosis?


A. Bacillus anthracis
B. Burkholderia pseudomallei
C. Haemophilus influenzae
D. Pasteurella multocida
E. Pseudomonas aeruginosa
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  #2  
Old 09-28-2010
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Default E
Pseudomonas aeroginosa
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  #3  
Old 09-28-2010
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I agree answer
Quote:
Originally Posted by khushboo View Post
A 20-year-old man from Queensland, Australia, has developed severe bronchopneumonia. His medical history is remarkable for cystic fibrosis and frequent hospitalizations caused by bacterial pneumonia. A sputum culture on blood and Ashdown media reveal wrinkled colonies that are oxidase positive. Gram staining shows gram-negative, bipolarly staining rods that resemble safety pins. What is the most likely diagnosis?


A. Bacillus anthracis
B. Burkholderia pseudomallei
C. Haemophilus influenzae
D. Pasteurella multocida
E. Pseudomonas aeruginosa
I think key words in this question are-cystic fibrosis history, oxidase positive, gram negative, BIPOLAR STAINING.

due to this w can easily rule out bacillus anthracis, h.infuenzae, and pseudomonas.
I was confused between pasteurella and burkholderia, but since i had read bipolar staining for burkholderia. (another bacteria typically associated with bipolar staining is yersinia pestis)
answer is B.
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  #4  
Old 09-28-2010
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Default hmmm
Yes B seems to be correct. Where do you get these kind of questions from. Very interesting! Thanks.
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  #5  
Old 09-28-2010
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Quote:
Originally Posted by faith View Post
i think key words in this question are-cystic fibrosis history,oxidase positive,gram negative,BIPOLAR STAINING.

due to this w can easily rule out bacillus anthracis,h.infuenzae,pseudomonas.
i was confused between pasteurella and burkholderia,but since i had read bipolar staining for burkholderia.(another bacteria typically associated with bipolar staining is yersinia pestis)
answer is B.
Yes rightly pointed out ...

Correct answer should be B...
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Old 09-28-2010
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Yup - I also have Burkholderia for Ashdown agar from wiki even though I'd never heard of this bug before - but thats not new. - Answer = B.
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  #7  
Old 09-28-2010
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Burkholderia pseudomallei
Quote:
Originally Posted by khushboo View Post
A 20-year-old man from Queensland, Australia, has developed severe bronchopneumonia. His medical history is remarkable for cystic fibrosis and frequent hospitalizations caused by bacterial pneumonia. A sputum culture on blood and Ashdown media reveal wrinkled colonies that are oxidase positive. Gram staining shows gram-negative, bipolarly staining rods that resemble safety pins. What is the most likely diagnosis?


A. Bacillus anthracis
B. Burkholderia pseudomallei
C. Haemophilus influenzae
D. Pasteurella multocida
E. Pseudomonas aeruginosa
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  #8  
Old 09-29-2010
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Default Shakaib
its really an interesting question ... but the answer is Burkholderia cepatia .. dont know about Burkholderia pseudomallei ....
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  #9  
Old 09-29-2010
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Wink Another consult question
I think Khushboo got it from her USMLE Consult bank that she won here in this forum
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Old 09-29-2010
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Quote:
Originally Posted by khushboo View Post
A 20-year-old man from Queensland, Australia, has developed severe bronchopneumonia. His medical history is remarkable for cystic fibrosis and frequent hospitalizations caused by bacterial pneumonia. A sputum culture on blood and Ashdown media reveal wrinkled colonies that are oxidase positive. Gram staining shows gram-negative, bipolarly staining rods that resemble safety pins. What is the most likely diagnosis?


A. Bacillus anthracis
B. Burkholderia pseudomallei
C. Haemophilus influenzae
D. Pasteurella multocida
E. Pseudomonas aeruginosa
Answer is B, check out wikipedia.
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