Aerosol parameter; mean* (95% CI) | n‡ | GNB aerosol (CFU) | n‡ | S. aureus aerosol (CFU) | P values |
Distance (m) | |||||
2 | 14 | 11 (4 to 28) | 9 | 5 (2 to 10) | 0.22 |
4 | 11 | 20 (7 to 50) | 8 | 7 (2 to 23) | 0.14 |
Duration (min) | |||||
5 | 10 | 13 (4 to 38) | 8 | 3 (1 to 8) | 0.062 |
15§ | 9 | 10 (3 to 32) | 6 | 4 (2 to 7) | 0.12 |
45§ | 9 | 12 (3 to 40) | 4 | 4 (1 to 12) | 0.10 |
*Geometric mean.
†18 GNB organisms identified from the sputum of 15 participants (three participants had two GNB species detected).
‡Target organisms identified in sputum that had a positive aerosol detected.
§One GNB group participant did not complete the 15 and 45 min duration experiments.
CFU/mL, colony forming units per millilitre of sputum; GNB, Gram-negative bacteria.