A 53-year-old male patient presents with 3 days history of fever, cough productive of purulent sputum and left sided chest pain that worse with inspiration. He is febrile at 40, PR 120, BP 140/60. His chest exam revealed bronchial breathing at the left lower base, CXR showed left lower lobe infiltrate. What is the most likely pathogen?
سؤال مجاني 7 من 10 اليوم · اشترك وكمّل بدون حد
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الإجابة والشرح
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الإجابة: A. Streptococcus pneumoniae
Acute high fever, purulent sputum, pleuritic pain and signs of lobar consolidation are typical pneumonia, and the most common cause is Streptococcus pneumoniae. Legionella and Mycoplasma cause atypical pneumonia, while S. aureus and Klebsiella are tied to specific settings (post-influenza, alcoholism/aspiration) not present here.
ليش كل خيار صح أو غلط
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A
ليش صح
Streptococcus pneumoniae is the most common cause of pneumonia, so it is the best fit for this acute lobar pneumonia with no special exposure.
✓ (Y4)-(M B) Pneumonia and pleural effusion - Resident.pdf · p. 29 -
B
ليش غلط
S. aureus pneumonia is more common after an episode of influenza, which this patient does not have.
✓ (Y4)-(M B) Pneumonia and pleural effusion - Resident.pdf · p. 29 -
C
ليش غلط
Klebsiella is more common in alcoholic patients (or poor dental hygiene), and nothing in the stem suggests that.
✓ (Y4)-(M B) Pneumonia and pleural effusion - Resident.pdf · p. 29 -
D
ليش غلط
Legionella occurs in local outbreaks linked to contaminated cooling towers in hotels, hospitals and industrial buildings; there is no such exposure here.
✓ (Y4)-(M B) Pneumonia and pleural effusion - Resident.pdf · p. 29 -
E
ليش غلط
Mycoplasma is an atypical pathogen: atypical pneumonia has unremarkable auscultation and interstitial changes, unlike the bronchial breathing and lobar infiltrate seen here.
✓ Pneumonia (1).pdf · p. 2
- المصدر
- (Y4)-(M B) Pneumonia and pleural effusion - Resident.pdf · p. 29
Pneumonia (1).pdf · p. 2 - المحاضرة
- Pneumonia · Pulmonology · Module B
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- Respi bank