IMPACT OF BACILLUS TROPICUS PROBIOTIC ON WATER QUALITY, HAEMATOLOGICAL INDICES AND LIVER ENZYME FUNCTIONS IN OREOCHROMIS NILOTICUS

Abstract

This study explores the impact of Bacillus tropicus, a probiotic strain isolated from fermented rice on water quality, haematological parameters and liver enzyme activities in Oreochromis niloticus over varying experimental durations. Fish treated with the probiotic exhibited notably lower ammonia and nitrite concentrations in tank water compared to the control. Significant (P<0.05) improvements in red blood cells and white blood cell counts, as well as haemoglobin levels were observed in probiotic-fed fish. Furthermore, a marked reduction in AST and ALT enzyme level was noted in probiotic fed fish group over the control suggesting enhanced liver health in the experimental group.