Question:easy
Which one of the following organisms causes pneumonia which most commonly results in Pneumatocele?
Which one of the following organisms causes pneumonia which most commonly results in Pneumatocele?
Show Hint
Think of the organism famous for necrotizing pneumonia and lung abscess in infants.
Updated On: Jul 7, 2026
- Klebsiella pneumoniae
- Haemophilus influenzae
- Staphylococcus aureus
- Streptococcus pneumoniae
Show Solution
The Correct Option is C
Solution and Explanation
Step 1: Define the lesion in question.
A pneumatocele is a thin, balloon-like air pocket inside the lung that forms after the small airways get damaged during pneumonia, trapping air like a one-way valve.
Step 2: Match this to the right bug.
Staphylococcus aureus is notorious for tearing up lung tissue badly, causing necrosis and abscesses, particularly in babies and small children. That same destructive process on the tiny airways is what leaves behind pneumatoceles, which is why staph pneumonia is the textbook cause of this finding.
Step 3: Go through the other choices.
Klebsiella can cause a severe necrotizing pneumonia and abscesses too, but it is not the organism classically tied to pneumatoceles. Haemophilus influenzae usually gives bronchopneumonia in children without this cystic complication. Streptococcus pneumoniae is the commonest cause of pneumonia in general but rarely leaves behind an air-filled cyst.
Step 4: Settle on the answer.
The organism most tied to pneumatocele formation is Staphylococcus aureus.
\[ \boxed{\text{Staphylococcus aureus}} \]
A pneumatocele is a thin, balloon-like air pocket inside the lung that forms after the small airways get damaged during pneumonia, trapping air like a one-way valve.
Step 2: Match this to the right bug.
Staphylococcus aureus is notorious for tearing up lung tissue badly, causing necrosis and abscesses, particularly in babies and small children. That same destructive process on the tiny airways is what leaves behind pneumatoceles, which is why staph pneumonia is the textbook cause of this finding.
Step 3: Go through the other choices.
Klebsiella can cause a severe necrotizing pneumonia and abscesses too, but it is not the organism classically tied to pneumatoceles. Haemophilus influenzae usually gives bronchopneumonia in children without this cystic complication. Streptococcus pneumoniae is the commonest cause of pneumonia in general but rarely leaves behind an air-filled cyst.
Step 4: Settle on the answer.
The organism most tied to pneumatocele formation is Staphylococcus aureus.
\[ \boxed{\text{Staphylococcus aureus}} \]
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