[Peculiarities of clinical and X-ray picture of pneumonia in patients with influenza A (H1N1)].

A distinctive feature of pneumonia in influenza A (H1N1) is interstitial infiltration of lung tissues and high frequency of pulmonary lesions leading to acute lung injury/acute respiratory distress syndrome in half of the patients. Severe clinical course of the disease and complications (pleuritis, abscess, pulmonary thromboembolism) diagnosed by X-ray were recorded in 29% of the patients. The final X-ray examination revealed normalization of the lung structure only in 15.5% of the cases mostly the patients with mild pneumonia. 15.5% of them developed post-pneumonic changes in the form of diffuse pneumosclerosis, pleural adhesions, and dry cavities in the lung tissue. Pulmonary CT is believed to be the most informative method for diagnostics of pneumonia and its complications during influenza A (H1N1).