USMLE Forum Archives - USMLE Step 3 - IM2
IM2
bingousmle - 06-20-10 05:52
A 46-year-old alcoholic man presents to the ED with cough, fever, and rigors for 2 days. He describes his sputum as rust-colored. His vital signs are: temperature 101.1°F, HR 94, BP 125/75 mm Hg, RR 20, and pulse oxygen of 97% on room air. Auscultation reveals crackles in the left-lower lobe. Chest radiograph is significant for a left-lower lobar infiltrate. Which of
the following organism is the most common cause of community acquired bacterial pneumonia?
a. Haemophilus influenza
b. Streptococcus pneumoniae
c. Klebsiella pneumonia
d. Group A streptococci
e. Pseudomonas aeruginosa
bingousmle - 06-20-10 05:52
A 46-year-old alcoholic man presents to the ED with cough, fever, and rigors for 2 days. He describes his sputum as rust-colored. His vital signs are: temperature 101.1°F, HR 94, BP 125/75 mm Hg, RR 20, and pulse oxygen of 97% on room air. Auscultation reveals crackles in the left-lower lobe. Chest radiograph is significant for a left-lower lobar infiltrate. Which of
the following organism is the most common cause of community acquired bacterial pneumonia?
a. Haemophilus influenza
b. Streptococcus pneumoniae
c. Klebsiella pneumonia
d. Group A streptococci
e. Pseudomonas aeruginosa
The correct answer and explanation will be available after you answer.
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#2
Re: IM2
bingousmle - 06-20-10 06:26 My answer is: b.
Haemophilus influenzae is the second most common cause of community acquired pneumonia in adults and is particularly common among patients with COPD and AIDS
#3
Re: IM2 babbu5508 - 06-20-10 14:03 My answer is: b.
b. Streptococcus pneumoniae is the most common cause of community acquired bacterial pneumonia..also confirmed here by rust coloured sputum
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