primary atypical pneumonia

n.
  1. An acute systemic disease with involvement of the lungs, caused by Mycoplasma pneumoniae and marked by high fever and cough.atypical pneumonia mycoplasmal pneumonia
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.