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: Pathology
Atypical pneumonia can be caused by the following microbial agents except ? 
Select and explain. 
A. Mycoplasma pneumoniae, B. Legionella peumophila, C. Human corona virus, D. Klebsiella pneumoniae
D: Klebsiella pneumoniae
Answer: D: Klebsiella pneumoniae 
Explanation: Ans. is 'd' i.e., Kleibsella pneumoniae Atypical pneumonia is interstial pneumonia, while Kleibsella causes airspace pneumona. Kleibsella pneumonia presents as a typical 'air space' pneumonia with cough productive of purulent sputum. Causes of Atypical pneumonias Mycoplasma pneumonias Viral pneumonias -4 Influenza, RSV, Adenovirus, Rhinovirus, Rubeola, Varicella, Corona virus Legionella Chlamydia pneumonia Coxiel la burnetti Pneumocystis carinii