Lung abscess: Risk groups and factors for morbidity and mortality, and prognostically poor clinical symptoms

The 2000-2009 Perm Territory records show that lung abscess morbidity and mortality had no declining trends in these years. The morbidity and mortality rates ranged from 8.2 to 14.4 and from 1 to 1.5 per 100,000 population, respectively. The intra-annual trend in morbidity associated with lung abscess is characterized by its autumn-winter prevalence and coincides with that in pneumonia morbidity. 40-69-year-old unemployed males living in rural areas are a risk group for morbidity and mortality in lung abscess. The major risk factors for lung abscess morbidity in both urban and rural areas are prior pneumonia, chronic obstructive pulmonary diseases, bronchiectatic disease, smoking, alcoholism, and work under cooling conditions. Increased lung abscess morbidity and mortality rates in the rural versus urban dwellers are due to late medical care to the rural population and to long-term domiciliary medical treatment. The prognostically poor clinical symptoms in lung abscesses are lung bleeding, bilateral lung lesions, and the presence of a pyo-destructive cavity more than 6 cm in diameter or multiple lesion foci in the lung.