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Lobar pneumonia is a form of pneumonia characterized by inflammatory exudate within the intra-alveolar space resulting in consolidation that affects a large and continuous area of the lobe of a lung. [1] [2] It is one of three anatomic classifications of pneumonia (the other being bronchopneumonia and atypical pneumonia).
Necrotizing pneumonia (NP), also known as cavitary pneumonia or cavitatory necrosis, is a rare but severe complication of lung parenchymal infection. [ 1 ] [ 2 ] [ 3 ] In necrotizing pneumonia, there is a substantial liquefaction following death of the lung tissue, which may lead to gangrene formation in the lung.
With treatment, most types of bacterial pneumonia will stabilize in 3–6 days. [2] It often takes a few weeks before most symptoms resolve. [2] X-ray findings typically clear within four weeks and mortality is low (less than 1%). [24] [140] In the elderly or people with other lung problems, recovery may take more than 12 weeks.
Pneumococcal pneumonia is a type of bacterial pneumonia that is caused by Streptococcus pneumoniae (pneumococcus). [1] It is the most common bacterial pneumonia found in adults, the most common type of community-acquired pneumonia , and one of the common types of pneumococcal infection .
Signs that consolidation may have occurred include: Expansion of the thorax on inspiration is reduced on the affected side; Vocal fremitus is increased on the affected side; Percussion note is impaired in the affected area; Breath sounds are bronchial; Possible medium, late, or pan-inspiratory crackles; Vocal resonance is increased.
Ground-glass opacity (GGO) is a finding seen on chest x-ray (radiograph) or computed tomography (CT) imaging of the lungs. It is typically defined as an area of hazy opacification (x-ray) or increased attenuation (CT) due to air displacement by fluid, airway collapse, fibrosis , or a neoplastic process . [ 1 ]
Chest radiographs (X-ray photographs) often show a pulmonary infection before physical signs of atypical pneumonia are observable at all. [5] This is occult pneumonia . In general, occult pneumonia is rather often present in patients with pneumonia and can also be caused by Streptococcus pneumoniae , as the decrease of occult pneumonia after ...
The discovery of x-rays made it possible to determine the anatomic type of pneumonia without direct examination of the lungs at autopsy and led to the development of a radiological classification. Early investigators distinguished between typical lobar pneumonia and atypical (e.g. Chlamydophila ) or viral pneumonia using the location ...