8
Protocols (cont.)
¬Bacterial aerosol (Mycobacterium parafortuitum) generated for 90 min,
air samples collected for the last 30 minutes.
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¬Biological air samples collected during sampling using duplicate impingers (AGI-30) filled with 30 mL of phosphate buffer solution (PBS) in each of the three sampling locations.
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¬Duct surface samples collected by placing pieces of sheet metal onto ductwork prior to experiments and collected afterwards to be rinsed with PBS in order to perform microbiological analysis similar to the air samples.  
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¬UVGI lamps installed 0.38 m before sampling location in the recirculation duct.  
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