Table 1.

Mean currents recorded during experiments, with range indicated in brackets.

Bacterium	Average Current (range) (μA)
	Negative ions	Positive ions	Negative ions with mica plate	Negative ions with wire mesh
Serratia marcescens	76.0 (65 – 95)	42.3 (30 – 50)	0.000 (0 – 0.005)	0.001 (0 – 0.01)
Acinetobacter baumanii	102.0 (40 – 150)	35.3 (30 – 45)	0.003 (0 – 0.005)	0.000 (0 – 0)
Staphylococcus aureus	65.00 (30 – 90)	36.0 (25 – 45)	0.003 (0 – 0.05)	0.000 (0 – 0)
Burkholderia cenocepacia	109.0 (95 – 120)	32.0 (30 – 35)	0.022 (0 – 0.2)	0.000 (0 – 0)
Pseudomonas aeruginosa	97.0 (80 – 105)	36.3 (30 – 40)	0.003 (0 – 0.025)	0.000 (0 – 0)
Mycobacterium parafortuitum	113.0 (95 – 130)	36.3 (25 – 45)	0.009 (0 – 0.05)	0.000 (0 – 0)
Bacillus subtilis	114.3 (90 – 135)	27 (20 – 40)	0.002 (0 – 0.025)	0.000 (0 – 0)