Airborne samples were collected as part of a comparison of the Bi-Air® cassette with the Air-O-Cell cassette. Four consecutive side-by-side samples were collected. The concentrations (spores/m3) have been compared for total airborne fungal spores and Cladosporium spores for each type of cassette.

Comparison of Total Airborne Fungal Spore Concentrations
Sample	Air-O-Cell™	Bi-Air®	Ratio
1	493	1,409	2.9
2	616	1,899	3.1
3	431	490	1.1
4	185	980	5.3
AVERAGE	431	1195	3.1

Comparison of Cladosporium Concentrations
Sample	Air-O-Cell™	Bi-Air®	Ratio
1	246	797	3.2
2	246	674	2.7
3	185	184	1.0
4	123	674	5.5
AVERAGE	200	582	3.1

The median concentrations, and the upper (UCL) and lower (LCL) 95% confidence limits for the median concentrations, were also calculated for the above data.

Cassette	Spore Type	LCL	Median	UCL
Air-O-Cell™	Total	191	395	814
Bi-Air®	Total	476	1065	2,380

Cassette	Spore Type	LCL	Median	UCL
Air-O-Cell™	Cladosporium	123	193	303
Bi-Air®	Cladosporium	199	508	1,299

The data were also used to compare the distribution of fungal spores between the two slits of the Bi-Air® cassette for the four samples.

	Spore Type	Slit	LCL	Median	UCL
	Total	1	368	1,009	2,764
	Total	2	578	1,104	2,108

	Spore Type	Slit	LCL	Median	UCL
	Cladosporium	1	220	505	1,208
	Cladosporium	2	132	460	1,615