Evaluation of Growth and Health Performance of Juvenile Tilapia Sp. Fed with Various Supplementation of Heat-Killed

Thus, this research was conducted to evaluate the supplementation of heat-killed at higher dosages and investigate the effect of heat-killed supplementation on the challenges of . A feeding trial was conducted for 90 (initial average body weight of 12.52-12.69 g) days, while a disease challenge was conducted for 17 days. Dietary treatments were formulated to have a ranging level of heat-killed L-137: (1) control treatment without heat-killed , (2) diet containing 10 mg/kg heat-killed L-137 preparation (LP20, which contains 20% heat-killed L-137), (3) diet containing 20 mg/kg LP20, (4) diet containing 100 mg/kg LP20, and (5) diet containing 250 mg/kg LP20. All the diets were formulated to have equal values of protein and energy. Dietary supplementation of heat-killed L-137 improved tilapia growth performance and higher robustness against . infection. Therefore, a 10-20 mg/kg LP20 feed supplementation level is recommended to support the tilapia growth. In addition, an LP20 dietary supplementation level of 250 mg/kg feed is recommended for higher protection against .