Fig. 3.

Relative collection efficiency (%, mean ± 1SD) of passive samplers when capturing total bioaerosol particles (culturable + non-culturable bacteria and fungi) as enumerated by Acridine Orange staining and epifluorescence microscopy. The reference Button Aerosol Samplers were operated at 4 L/min. The number of samples presented here by sampler are: Button Sampler (n=30 per campaign), passive PTFE filter (n=6 per campaign), REPS (n=6 per campaign). For the Button Sampler, three were deployed each 24-hours, the average of those three was determined each 24-hours, and then the campaign total was taken as the sum across the 10 days of averaged daily intervals. For the passive samplers, an average was found across the six deployed samplers for each campaign.