Abstract
The present study aims to develop five Gram-negative bacteria expressing bacterial luciferase for use to evaluate the influence of different antibiotics on bacterial bioluminescence. The pBBR-lux plasmid was introduced into five Gram-negative bacteria; the bioluminescent signals and colony-forming unit (CFU)/ml of all the bioluminescent strains were monitored with six antibiotics at various concentrations. Dose-dependent bioluminescence signals can be used for rapid bacterial antibiotic susceptibility test (AST). All five bioluminescent bacterial strains have similar bioluminescence and CFU enhancement at sub-minimum inhibitory concentration (MIC) of six different antibiotics. The bioluminescent signals and CFU enhancement at sub-MIC antibiotic concentrations should be of value in the research of new antibiotic drugs and bioluminescent imaging.
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