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Table 2 Energy levels and bactericidal efficiencies for the inactivation of bacterial species using 405- and 465-nm LEDs

From: Photoinactivation of major bacterial pathogens in aquaculture

Species

Wavelength (nm)

Dose (J cm−2)

Log10 reduction (±SD)

Dose/log10 reduction (±SD)

BEa (±SD)

Photobacterium damselae

405

137 (±4)

3.8

36.1 (±1.0)

0.028 (±0.001)

465

1387 (±126)

3.7

374.7 (±34.1)

0.003 (±0)

Vibrio anguillarum

405

132 (±4)

3.2

41.2 (±1.3)

0.024 (±0.001)

465

1934 (±3)

4

483.6 (±0.7)

0.002 (±0)

Edwardsiella tarda

405

260 (±10)

3.8

68.4 (±2.7)

0.015 (±0.001)

465

2178 (±517)

4.0

544.4 (±129.2)

0.002 (±0)

Streptococcus iniae

405

262 (±5)

2.9

90.4 (±1.6)

0.011 (±0)

465

247 (±3)

3.5

70.5 (±1)

0.014 (±0)

Aeromonas salmonicida

405

345 (±131)

3.5

98.7 (±37)

0.011 (±0.001)

465

555 (±10)

3.3

168.1 (±40.6)

0.006 (±0)

Vibrio harveyi

405

543.7 (±4.4)

4.3

126.4 (±1.0)

0.008 (±0)

465

NA

NA

NA

NA

Streptococcus parauberis

405

446 (±66)

2.9

153.8 (±22.8)

0.007 (±0.001)

465

743 (±153)

2.9

256.2 (±52.7)

0.004 (±0.001)

  1. aBactericidal efficiency, calculated as log10 (10/N 0) per radiant flux (J cm−2)
  2. N 0 initial bacterial population in CFU ml−1, NA not applicable, BE bactericidal efficiency