Nile tilapia plasma 〖"Na" 〗^"+" concentrations had a nominal increased in the infected group at week 1 However, its level had a significant decrease again by week 2 and 3 in FCA group in comparison to both infected and control groups. Plasma "K" ^"+" concentration significantly increased at week 1 in the infected group. At week 2 in FCA group the level decreased again significantly compared to the infected group; but was not significant compared to the control group (Figures 4b, 5d).