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Reactive oxygen species (ROS) production in Atlantic cod macrophages after 1 and 6 h post-infection with A. salmonicida. (A) Mean FITC fluorescence and (B) percentage of FITC positive cells were obtained by flow cytometry. PBS inoculated cells (PBS) and PMA inoculated cells were utilized as negative and positive controls, respectively. Each value is the mean ± S.E.M (n = 6). Symbol (*) indicate differences on each group at different times of infection, p < 0.005.
