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Influence of probiotic Lactobacillus acidophilus on immune response, hematological parameters and resistance of striped catfish (Pangasianodon hypophthalmus sauvage, 1878) juveniles against Aeromonas hydrophila CT19
3rd International Conference on Aquaculture & Fisheries
September 29-October 01, 2016 London, UK
Mst Nahid Akter, Amalia Sutriana, Roshada Hashim, Siti Azizah Mohd Nor
Universiti Sains Malaysia, Malaysia
Posters & Accepted Abstracts: J Aquac Res Development
Abstract:
The effects of dietary supplementation with Lactobacillus acidophilus on hematology parameters, immune response and protection against Aeromonas hydrophila CT19 were evaluated in striped catfish (Pangasianodon hypophthalmus, Sauvage, 1878) juveniles. The diet that was not supplemented with LAB served as the control. Four diets containing various levels of Lactobacillus acidophilus (103, 105, 107 and 109 CFU/g) were prepared and fed twice daily at 2.5% of fish body weight to triplicate groups of striped catfish juveniles (initial weight of 21.69±0.18 g) for 12 weeks. Fish were challenged with A. hydrophila CT19 after the 12-week feeding trial and mortalities were recorded for 3 weeks. The results of challenge test indicated that the survival improved with increased Lactobacillus acidophilus up to 105 CFU/g, beyond which survival did not change significantly. A better concentration of hematological parameters and total immunoglobulin (Ig) content was reported when the striped catfish fed with Lactobacillus acidophilus supplemented diets. After 3-week post challenged, the hematological parameters, total Ig content and survival were significantly highest in fish fed with LAB supplemented diets at 105 CFU/g and above, while it was not observed in the case of lysozyme activity. Based on the results of this study it is concluded that supplementation with L. acidophilus at least 105 CFU/g has positive influenced on hematology parameters, immune response and resistance against A. hydrophila CT19 in striped catfish juveniles.