<prompt> Atypical pneumonia is caused by -Staph aureusStre pneumoniaP cariniiH influenzae  <response>: Ans. is c i.e., P carinii o Important causes of atypical pneumonia are Mycoplasma pneumoniae most common cause, viruses influenza, RSV, adenovirus, rhinovirus, corona virus, legionella, chlamydia, coxiella bumetti, and P. carinii. 