Abstract:
Improved resistance against diseases in Nile tilapia, Oreochromis niloticus can be achieved by probiotics. A total of 450 fish (50±5 G) were divided into 5 groups: 1 st group received diet with 0.1 ml/kg C.A growth® probiotic, 2nd group received diet with 0.2 ml/kg feed C.A growth® probiotic, 3rd group received diet with 0.15 G/kg feed Tonolest® probiotic, 4th group received diet with 0.3 G/kg feed Tonolest® probiotic, 5th group was fed on probiotic-free diet. Eight weeks later, fish fed C.A growth® probiotic revealed significant increase in phagocytic activity, differential leucocytic count, serum lysozyme and bactericidal activity, total protein and globulin levels than fish fed on Tonolest® probiotic. Moreover, groups receiving C.A growth® probiotic showed significant increase in antibody titre against Aeromonas hydrophila than other groups. In addition, Nile tilapia receiving C.A growth® probiotic showed significant decrease in cortisol hormone and bacterial counts in gastrointestinal tract than fish receiving Tonolest® probiotic in all weeks. C.A growth® probiotic evoked no/limited cellular damage and decreased pathological lesions in groups challenged with A. hydrophila. On the other hand, Tonolest® probiotic evoked more pathological damage in organs especially with high dose and less effective in decreasing pathological changes in groups challenged with A. hydrophila.
Page(s):
1269-1282
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Zoology, Volume: 48, Issue: 5, Year: 2016