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Evaluation of live yeast, saccaromyces castellias a probiotic in Nile tilapia, (Oreochromis niloticus) [electronic resource].

By:

Hazaa, Mahmoud M

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Language: English Summary language: Arabic Description: p.402-422Other title:

تقيم خميرة السكارومايسس كاستيلي في أسماك البلطي النيلي.‪ [Added title page title]

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Abbassa international journal for aquaculture, 2010, Conference, Special issue [electronic resource]:

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In: Abbassa international journal for aquaculture 2010,SISummary: The purpose of this study was to evaluate the effect of dietary administration of the live yeast Saccaromyces castelli in Oreochromis niloticus as immunostimulant, growth promoter and increase fish resistance to the bacterial diseases. 5accaromyces castelli was isolated from intestine of black carp (MylophafY"9odon piceuS). One hundred and thirty five apparently healthy O. niloticus (20 ± 3 g average body weight) were assigned randomly to three groups; each group in three replicates (15 fish per each replica). COmmercial basal diet (crude protein 30%) was crushed, and then divided into three parts. The first part was basal diet mixed with sterile saline as a control (Tl)' The second (T2) and third (T3) parts were basal diet mixed with (5 and 10 g of live yeast I kg diet) respectively. Fish were fed twice daily until satiation for 28 days. At the end of experimental period, fish was challenged i.p. with Aeromonas soMa and Pseudomonase f1uorescers and kept under observation for 14 days. 5accaromyces castelli had antibacterial activity against Psudomonas anguilliseptJca, Ps. fluorescens, Aeromonas veronii and A. soMa in vitro with inhibition zones 38, 40, 13 and 42 mm in diameters respectively. The best growth rate, specific growth rate and feed conversion ratio were obtained with T2 and T3 compared to Tl' Significance increased in the heamatocrite value, respiratory burst, lysozyme activity and serum bactericidal activities among fish fed with diet contained live yeast compared to control fish. saccaromyces castelli supplemented diet had positive effect on the total bacterial viable count in the intestine by decreasing its count than control group. Aiso it increased antibody titer of A. sobria and Ps. fluorescence than control group, Fish of group Tz and TJ had resistance against A. soMa and Ps. fluorescence while, fish of T3 gave relative level of protection (RLP) higher than T2 against Pseudomonase fluorescence. So, Saccaromyces castelli enhanced growth, immune response and resistance of O. niloticusagainst A. sobriaand Ps. fluorescens.

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The purpose of this study was to evaluate the effect of dietary administration of the live yeast Saccaromyces castelli in Oreochromis niloticus as immunostimulant, growth promoter and increase fish resistance to the bacterial diseases. 5accaromyces castelli was isolated from intestine of black carp (MylophafY"9odon piceuS). One hundred and thirty five apparently healthy O. niloticus (20 ± 3 g average body weight) were assigned randomly to three groups; each group in three replicates (15 fish per each replica). COmmercial basal diet (crude protein 30%) was crushed, and then divided into three parts. The first part was basal diet mixed with sterile saline as a control (Tl)' The second (T2) and third (T3) parts were basal diet mixed with (5 and 10 g of live yeast I kg diet) respectively. Fish were fed twice daily until satiation for 28 days. At the end of experimental period, fish was challenged i.p. with Aeromonas soMa and Pseudomonase f1uorescers and kept under observation for 14 days. 5accaromyces castelli had antibacterial activity against Psudomonas anguilliseptJca, Ps. fluorescens, Aeromonas veronii and A. soMa in vitro with inhibition zones 38, 40, 13 and 42 mm in diameters respectively. The best growth rate, specific growth rate and feed conversion ratio were obtained with T2 and T3 compared to Tl' Significance increased in the heamatocrite value, respiratory burst, lysozyme activity and serum bactericidal activities among fish fed with diet contained live yeast compared to control fish. saccaromyces castelli supplemented diet had positive effect on the total bacterial viable count in the intestine by decreasing its count than control group. Aiso it increased antibody titer of A. sobria and Ps. fluorescence than control group, Fish of group Tz and TJ had resistance against A. soMa and Ps. fluorescence while, fish of T3 gave relative level of protection (RLP) higher than T2 against Pseudomonase fluorescence. So, Saccaromyces castelli enhanced growth, immune response and resistance of O. niloticusagainst A. sobriaand Ps. fluorescens.

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