Infection of the lungs caused by certain germs.
Infection with: staphylococci, streptococci, Hemophilius influenzae, Chlamydia, Enterobacteriaceae, cytomegalovirus
Predominant sign is cough that is usually accompanied by a mucous expectoration.
Chest pain occurs especially when taking a deep breath.
Fever with chills, sweating, fatigue, malaise and headache.