Question 10.
Select one "bug" that is a gram-negative rod related to the respiratory tract ?
A.Haemophilus
B.Klebsiella
C.Pseudomonas
D.Bacterioides
Could someone help me to understand why choice A given as the right option? Because both Klebsiella and Pseudomonas stain Gram-negative and can cause respiratory tract disease as well.
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| prep4usmle
Administrator
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Hi,
There is a table in the Levinson book with the classification of gram negative rods related to digestive tract, respiratory tract, zoonotic bacteria .... and this is what I used for this question.
If you have the same book please correct me.
Regards!
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| Yulia
Forum Elite
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I am just saying that there is more than 1 good answer.
I surely have the book, 5th edition. The table you probably referring to puts Hemophilus, Legionella and Bordetella together as bugs with source of site of infection in Respiratory Tract. The same table states source of infection site for Klebsiella and Pseudomonas outside of enteric tract. And if you think about it Klebsiella does cause pneumonia, and Pseudomonas can cause infection anywhere, including respiratory tract infections (in cystic fibrosis patients classically for example). So you can't say these are not related to respiratory tract.
Please correct me if I am wrong.
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| wampum76
Forum Newbie
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h.influenza strain B is the most virulent form, and hence the answer
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| EMI777LY
Forum Senior
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Yalia, My opinion , probably I can be wrong ,but they asking related Only because of this it can be a Wright answer. H. influenzae is a common organism worldwide; it has been found in the nasal secretions of as many as 90% of healthy individuals in the general population. They live here  in nose :o , and people carrier it :shock: , but under some circumstances they activate ting :shock: and you know
:cry:
Hemophilus influenzae---Gram rod common cause of pneumonia in cystic fibrosis and COPD
ACUTE EPIGLOTTIS IN CHILDREN
Pseudomonas aeruginosa gram- thin rod- water loving bacteria often transmitted by respiratory therapy. Common cause of nosocomial pneumonia and pneumonia in cystic fibrosis
Klebsiella Gram fat rod with capsule pneumonia commonly associated with alcoholics and nursing homes :P :P
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