Blue light-emitting diode photoinactivation inhibits edwardsiellosis in fancy carp (Cyprinus carpio)

This study provides data on photoinactivation of blue LED light on the fish pathogen Edwardsiella piscicida, and the optimal conditions of light intensity and exposure time for inactivation. We also demonstrate that appropriate blue LED exposure reduced viable E. piscicida in rearing water and infection rates without causing adverse side-effects. The use of high-intensity narrow-spectrum blue LED light, without the addition of a photosensitizer, has great potential as an eco-friendly option for treating bacterial diseases in aquatic animals, and will help to reduce the use of antibiotics.