USMLE Forums banner

1 - 10 of 10 Posts

·
Registered
Joined
·
487 Posts
Discussion Starter · #1 ·
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
 

·
Registered
Joined
·
161 Posts
answer

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.
 

·
Registered
Joined
·
373 Posts
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...
 
  • Like
Reactions: rigbbm

·
Registered
Joined
·
3 Posts
Burkholderia pseudomallei :eek:
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
 

·
Registered
Joined
·
6 Posts
Shakaib

its really an interesting question ... :) but the answer is Burkholderia cepatia .. dont know about Burkholderia pseudomallei ....
 

·
Registered
Joined
·
438 Posts
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.:)
 
1 - 10 of 10 Posts
Top