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Table 3 Relative growth of pathogenic bacteria with different initial population densities when exposed to 405- and 465-nm LED arrays for 24 h

From: Photoinactivation of major bacterial pathogens in aquaculture

Bacteria Wavelength (nm) Relative growth (%)a (± standard deviation)
Initial bacterial cell counts (log CFU ml−1)
3 4 5 6 7 8
Vibrio harveyi 405 0 (±0)b 2 (±1)b 74 (±4)c 77 (±3)c 86 (±12)c 83 (±2)c
465 70 (±61)b 68 (±2)b 72 (±2)b 69 (±3)b 78 (±18)b 76 (±2)b
Vibrio anguillarum 405 0 (±0)b 1 (±2)b 0 (±0)b 0 (±0)b 0 (±0)b 31 (±10)c
465 0 (±0)b 0 (±0)b 0 (±0)b 107 (±40)c 107 (±30)c 105 (±25)c
Edwardsiella tarda 405 0 (±1)b 0 (±0)b 0 (±0)b 0 (±0)b 1 (±1)b 71 (±10)c
465 1 (±1)b 0 (±0)b 76 (±18)c 121 (±24)d 86 (±6)c 83 (±2)c
Aeromonas salmonicida 405 0 (±0)b 0 (±0)b 0 (±0)b 0 (±0)b 0 (±0)b 0 (±0)b
465 0 (±0)b 0 (±0)b 0 (±0)b 0 (±0)b 0 (±0)b 44 (±4)c
Photobacterium damselae 405 77 (±3)b 105 (±2)d 109 (±12)d 103 (±4)d 86 (±8)b, c 99 (±1)c, d
465 103 (±1)b 108 (±17)b 95 (±8)b 86 (±7)c 66 (±6)b, c 88 (±3)b, c
Streptococcus iniae 405 0 (±0)b 0 (±0)b 0 (±0)b 16 (±6)b 84 (±2)b 95 (±3)c
465 1 (±1)b 0 (±0)b 0 (±0)b 1 (±0)c 2 (±1)c 51 (±8)d
Streptococcus parauberis 405 0 (±0)b 0 (±0)b 0 (±0)b 7 (±6)b, c 10 (±2)c 44 (±5)d
465 0 (±0)b 0 (±1)b 0 (±0)b 11 (±2)c 10 (±4)c 44 (±6)d
  1. Different letters (b, c, and d) in the superscripts indicate significant differences (P<0.05)
  2. aRatio of optical density (OD) of control to OD of LED treatment group (treatment OD630 nm/control OD630 nm)