Mycoplasma pneumonia (mycoplasma pneumonia) is an acute interstitial pneumonia caused by mycoplasma pneumonia. It occurs mostly in children and young adults and decreases with age. The adult of 50 years old above is recessive infection more, suffer from this disease less. Fall, winter festival comes on more, it is to send out normally, can popular occasionally.
1. Etiology mycoplasma pneumonia is the only pathogenic mycoplasma in human body. It is the smallest known pathogenic microorganism that can live independently. Mycoplasma exists in respiratory secretions of patients and is mainly infected by droplets.
2. Pathological changes mycoplasma pneumonia invading the respiratory tract may cause inflammation of the upper respiratory tract, trachea and bronchitis, and pneumonia.
To the naked eye, the lesions in the lung are segmental or focal, often involving a pulmonary lobe, the following lobe is more common, dark red, because mycoplasma pneumonia belongs to interstitial pneumonia, alveolar cavity exudation is not obvious, so there is no consolidation of the lesion. There is no or only a small amount of red foamy liquid flowing out from the cut surface. There is a small amount of mucous exudate in the trachea and bronchi, and the pleura is smooth. Microscopically, the lesions mainly occurred in the pulmonary interstitium, the alveolar septum, the bronchioles and the surrounding interstitium of the bronchioles and the bronchioles were significantly widened, hyperemia and edema were observed, and a large number of lymphocytes and macrophages were infiltrated. Alveolar cavity usually has no exudate or only a small amount of serous exudate. In severe cases, degeneration and necrosis may also occur in bronchial epithelium and lung tissue. Neutrophil infiltration is seen with infection.
3. Clinicopathological correlation clinically, the patient has a more acute onset of the disease, with fever, headache, general symptoms such as systemic discomfort. Prominent symptoms are persistent and acute cough due to acute inflammation of the bronchi and bronchioles, starting with a dry cough followed by mucus. X-ray examination showed segmental lung texture enhancement and reticular and patchy shadows. Peripheral blood leukocyte count slightly increased.
Mycoplasma pneumonia and viral pneumonia are not easy to distinguish clinically, but can be confirmed by the sputum, nasal secretions and pharyngeal test of patients with mycoplasma pneumonia culture. In addition, about half of the patients had positive erythrocyte condensation test, which can also help diagnosis. Mycoplasma pneumonia has a good prognosis and a natural course of illness of about 2 weeks.
Post time: Jan-07-2020