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Effect of the probiotic, Lactobacillus plantarum on growth performance and haematological indices of rainbow trout (Oncorhynchus mykiss) immunized with bivalent streptococcosis / lactococcosis vaccine
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M. Soltani *   , A. Kane , A. Taheri-Mirghaed , K. Pakzad , P. Hosseini-Shekarabi |
| Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran , msoltani@ut.ac.ir |
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Abstract: (4816 Views) |
| The present study evaluated the effect of Lactobacillus plantarum as a probiotic on the growth performance and haematological parameters of juvenile rainbow trout (Oncorhynchus mykiss) weighing 29.6±1.8 g immunized with streptococcus/lactococcus bivalent vaccine for 60 days at 16±1.5ºC. Fish were randomly allocated to 4 equal groups: probiotic (g kg-1 feed equal to 108 cells g-1) supplemented diet group (group P), vaccinated fish fed with a normal diet (group V), vaccinated fish fed with probiotic (group P+V) and unvaccinated fish fed normal diet (group C). Results showed that weight gain, final weight, condition factor and thermal-unit growth coefficient were improved in P+V group compared with other groups but was significantly different from groups V and C (p<0.05). Also, feed conversion ratio in the P+V group was lower than other trails (p<0.05). In addition, white blood cell count (WBC) in groups V and P+V were significantly higher than in both P and C groups (p<0.05). Also, PCV was significantly increased (p<0.05) in both P and P+V groups compared to group V and the control group. No significant difference (p>0.05) was found in RBC, Hb, MCH, MCHC and MCV levels among the different experimental groups. These data show that application of L. plantarum could be a benefit of vaccinated trout, enhancing fish growth and haematological parameters |
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| Keywords: Lactobacillus plantarum, probiotic, trout, haematology, growth, vaccine, streptococcosis/lactococcosis |
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Full-Text [PDF 307 kb]
(2358 Downloads)
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Type of Study: Orginal research papers |
Received: 2019/03/17 | Accepted: 2019/03/17 | Published: 2019/03/17
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