PMC

Comparison post-oxygenator/arterial filter of the total median emboli per second of the Baseline, Air, and After Air introduction during the 1 LPM of air challenge for the Inspire, Fusion, and Fusion with an arterial filter. Post-oxygenator/arterial filter the Fusion had a significantly greater number of total median emboli than the Inspire and Fusion Filter in the Baseline test point, and the Inspire had a significantly greater number of total median emboli than the Fusion Filter in the Baseline test point. The Fusion and Fusion Filter had a significantly greater number of total median emboli than the Inspire in the Air test point, and the Fusion had a significantly greater number of total median emboli than the Fusion Filter in the Air test point. The Fusion and Fusion Filter had a significantly greater number of total median emboli than the Inspire in the After Air test point, and the Fusion had a significantly greater number of total median emboli than the Fusion Filter in the After Air test point.

Relative abundances of the 20 most common bacterial taxa in indoor air, ventilation duct air, HVAC filter dust, and floor dust. Indoor and ventilation duct air include PM₁₀ samples from indoor air when the room was occupied. Floor dust samples were sieved PM₃₇ floor dust and resuspended PM₁₀ floor dust taken after occupancy. HVAC filter dust represents samples from the filter of the building HVAC system that handled a variable mixture of outdoor air and indoor return air. Taxa are classified to the highest taxonomic level to which they could be confidently assigned. Error bars represent one standard error of the mean for nine indoor air PM₁₀ samples, four floor dust samples, and three HVAC duct samples. Groups shown represent 55% of floor dust, 83% of HVAC filter dust, 51% of indoor air taxa, and 46% of ventilation duct air taxa.

Electropherograms obtained from Pentagon filter (A); BioWatch filter I (B); and BioWatch filter II (C). Resulting profiles on the left were from amplification of DNAs purified from air filter; profiles on the right were from air filter DNAs spiked with 100 copies of Ba Sterne. Background noise was detected from direct amplification of the three air filter samples, and the 10-plex Ba-signature was generated for all Ba-spiked air filter DNA samples. The observed nonspecific peak at 444 bp (highlighted in red) was readily distinguished from the 10 specific product peaks (1-pXO1_lef, 2-codY, 3-spoVT, 4-hemL, 5-pXO1_gerXB, 6-sspF, 7-pbp1A, 8-yihY, 9-BA0872, and 10-basB).

Each recirculating air filter module consisted of a plastic housing equipped with a pocket air filter and a fan. The air volume flow rate was regulated via the fan. Module dimensions (mm) are specified and the direction of airflow is indicated by a blue arrow. Barn 4 was equipped with four of these modules.