[Preliminary studies of the occurrence of allergenic mites in coal dust in the mines of the Upper Silesia].

The study was conducted in four coal mines located in Upper Silesia. A total of 40 specimens were found: 20 from the genus Tarsonemus (Tarsonemidae, Tarsonemida); 9 from the family Pygmephoridae (Tarsonemida); two males of Tyrophagus putrescentiae (Acaridae, Acaridida) and one tritonymph--Tyrophagus sp.; two unidentified larvae (Acaridae, Acaridida); one specimen of Oppia clavipectinata (Oppidae, Oribatida) and 5 other mites from this order. T. putrescentiae and species from the genus Tarsonemus are considered as allergenic mites which may cause sensitization in humans.