. 2015 Nov 2;5:15983. doi: 10.1038/srep15983

Table 1. Size characteristics of test airborne bacterial particles.

Bacterium	Airborne microorganisms
Bacterium	GMD (μm)	Peak diameter (μm)	GSD
E. coli	0.98 ± 0.004	1.04 ± 0.001	1.24 ± 0.341
B. subtilis	0.99 ± 0.013	1.04 ± 0.030	1.26 ± 0.013
S. epidermidis	0.79 ± 0.002	0.84 ± 0.026	1.18 ± 0.001

The geometric standard deviation (GSD) is defined as Inline graphic , where d_j is the diameter of an individual particle, n_j is the number of particles in the j^th group, N is the total number of particles, and ln d_g is the natural logarithm of the geometric mean diameter (GMD) of the particles, defined as . Data are listed as the means of 10 repetitions plus/minus the standard deviation.