ITIL (the Information Technology Infrastructure Library) is a best practice IT Service Management process framework initially developed by the Office of Government Commerce (OGC) within the UK government.
It may also be classified by the area of lung affected: lobar pneumonia, bronchial pneumonia and acute interstitial pneumonia; or by the causative organism. Pneumonia in children may additionally be classified based on signs and symptoms as non-severe, severe, or very severe.
Humoral immunity may play a secondary role. Once infection is established, Legionella organisms cause an acute fibrinopurulent pneumonia with alveolitis and bronchiolitis. In addition to the lungs, Legionella organisms may infect the lymph nodes, brain, kidney, liver, spleen, bone marrow, and myocardium. Previous.