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
The lung abscess in children can be caused by all except – 
Select and explain. 
A. Pneumococcus, B. E. Histolytica, C. Staphylococcus, D. Klebsiella
B: E. Histolytica
Answer: B: E. Histolytica 
Explanation: Lung abscess in children 

Lung abscess is most likely to occur in -

i)  Immunocompromized patients
ii) Those with recurrent aspiration
iii) Malnutrition 
iv) Blunt chest trauma
v) Complication of pneumonia

Organisms commonly causing lung abscess are -
Staph. aureus  
H.influenzae 
S. pneumoniae  
Pseudomonas
E.coli 
Klebsiella                   
Others are → Nocardia, Legionella, Fungi (candida and aspergillus)