- community-acquired pneumonia: the presence of radiologically confirmed infiltration of the lung tissue; the presence of at least two of the following clinical signs: acute fever early in the disease (temperature > 38.0°C), cough with sputum, the physical signs of pneumonia (focus of crepitate and/or fine bubble rales, bronchial breathing hard, shortening of percussion sounds), leukocytosis > 10*10 9 /l and/or stab shift > 10%; the occurrence of the disease outside the hospital and the organized groups (such as nursing homes, sanatoriums, etc.).