Hemoglobin (Hb), hematocrit (Ht), red blood cells (RBCs) and
white blood cells (WBCs) of O. niloticus significantly increased
with each increase in B. licheniformis level, up to 0.48 · 106 -
CFU g1 B. licheniformis and then decreased as the diet was supplemented
with 0.96 · 106 CFU g1 B. licheniformis.