[Concentration of pollen dust in the atmosphere of Poland].
The main allergic disorders of the upper airways are the airborne pollens of various plants. In order to determine the concentration of plant pollens in the atmosphere of Poland in the years 1989-1991 studies were carried out determining pollen counts in 21 locations throughout Poland. Four main periods of pollination were observed: 1) early spring (trees, shrubs); 2) late spring (trees); 3) early summer (grass, hay); 4) summer and early autumn (combined plants). In northern Poland and the mountain regions beginning of pollination is 15-20 days later than in western Poland and is seen approximately 10-15 days later than in central Poland. The Polish pollen counts were compared with the data from Netherlands and Italy.