google_color_border = "FFFFFF"; The pathogenesis of M. pneumoniae infection is complex and … pneumonia. 1. So considered it might well be a physiological accident and not a pneumonia in the accepted sense of the term. ;  google_color_bg = "FFBBE8"; In addition to primary atypical pneumonia and community‑acquired pneumonia with predominantly respiratory symptoms, M. pneumoniae can also induce autoimmune hemolytic anemia and other diseases in the blood, cardiovascular system, gastrointestinal tract and skin, and can induce pericarditis, myocarditis, nephritis and meningitis. or lobar areas of congestion without consolidation hence called atypical Cytomegalovirus infection,