A 40-year-old patient has acute onset of disease caused by overexposure to cold. Temperature has increased up to 39°C. Foul-smelling sputum is expectorated during coughig. Various moist crackles can be auscultated above the 3rd segment on the right. Blood test: leukocytes - 15,0 × 109/l, stab neutrophils - 12%, ESR - 52 mm/hour. On X-ray: in the 3rd segment on the right there is a focus of shadow 3 cm in diameter, low density, with fuzzy smooth margins and a clearing in its center. What disease is most likely in the given case?