A seven-day volumetric spore trap for use within buildings

The Burkard Volumetric spore trap, designed to operate for seven days continuously in the field, was modified to sample still air within buildings. The efficiency with which spores of Lycopodium clavatum and Agaricus bisporus were trapped at two rates of suction was determined. Spore distribution within traces and deposition on surfaces not beneath the orifice were assessed. In an appendix catches of four spore types by the Hirst and Burkard (field model) spore traps operating over mown grass were compared.