Monitoring indoor pollen over two years

The present study monitored a private apartment for pollen that had settled on the floor. Pollen was sampled and analysed from two rooms over a period of two years. The study showed that pollen accumulations indoors are dominated by wind-pollinated species reflecting the current flowering season. The adjacent vegetation and the cleaning activities influenced the pollen content. Pollen from zoophilous plants mostly originated from ornamental plants within the flat. Similarities and differences between the two rooms and the two years were observed. These findings have implications for forensic investigations as well as allergological research.