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Aspiration pneumonia most often develops due to micro-aspiration of saliva, or bacteria carried on food and liquids, in combination with impaired host immune function. [30] Chronic inflammation of the lungs is a key feature in aspiration pneumonia in elderly nursing home residents and presents as a sporadic fever (one day per week for several ...
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 X-rays can be useful in the diagnosis of aspiration pneumonia but may be negative early in the course. [12] Chest CT Scan can identify the presence of a pneumonia as well, and can also assist in characterizing abscesses, foreign objects, or pleural disease. Aspiration seen on barium swallow study.
This includes fungal infections, mycobacterial infections such as tuberculosis or mycobacterium avium intracellulare, bronchopneumonia, chronic aspiration pneumonia, cystic fibrosis or cellular impaction from bronchovascular spread of malignancy, as can occur with breast cancer, leukemia or lymphoma. [2]
X-ray of focal pneumonia in lower right lung lobe (bottom left of chest in image) due to aspiration and airway obstruction. The most important aspect of the assessment for a clinician is an accurate history provided by an event witness. [7] Unfortunately, this is not always available.
Early investigators distinguished between typical lobar pneumonia and atypical (e.g. Chlamydophila) or viral pneumonia using the location, distribution, and appearance of the opacities they saw on chest x-rays. Certain x-ray findings can be used to help predict the course of illness, although it is not possible to clearly determine the ...
Typically, an area of white lung is seen on a standard X-ray. [5] Consolidated tissue is more radio-opaque than normally aerated lung parenchyma, so that it is clearly demonstrable in radiography and on CT scans. Consolidation is often a middle-to-late stage feature/complication in pulmonary infections.
A chest x-ray of a patient with severe viral pneumonia due to SARS In adults, viruses account for about one third of pneumonia cases, [ 12 ] and in children for about 15% of them. [ 44 ] Commonly implicated agents include rhinoviruses , coronaviruses , influenza virus , respiratory syncytial virus (RSV), adenovirus , and parainfluenza .