This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Pneumatocele is caused by – 
Select and explain. 
A. Staphylococcus, B. Streptococcus, C. Streptococcus pneumoniae, D. P. carnii
A: Staphylococcus
Answer: A: Staphylococcus 
Explanation: Pneumatoceles

These are multiple thin walled air containing cysts.
Staphylococcus aureus is the most common organism causing pneumatoceles and pneumatoceles are considered pathognomonic of staphylococcal pneumonia.
E.coli and klebsiella pneumonia may have pneumatoceles. __ O.P. Ghai 6th /e 350