期刊
AQUACULTURE
卷 376, 期 -, 页码 20-24出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aquaculture.2012.11.009
关键词
Probiotic; Lactococcus lactis; Immune response; Olive flounder
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0006364]
- National Research Foundation of Korea [2010-0006364] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We investigated the effects of a potential probiotic strain Lactococcus lactis subsp. lactis I2 on the immune response and growth of olive flounder (Paralichthys olivaceus), and their capacity to prevent streptococcosis after Streptococcus iniae challenge. The L. lactis subsp. lactis I2 strain, isolated from olive flounder intestine, was supplemented orally as a feed additive (similar to 10(8) CFU g(-1)) to fish for 5 weeks. Compared with the untreated group, the rate of growth was increased in the I2-diet group. The administration of I2 to olive flounder enhanced non-specific immune parameters, such as lysozyme, antiprotease, serum peroxidase and blood respiratory burst activities. At 9 days after challenge with S. iniae (10(8) CFU), the untreated control group experienced a 90% mortality rate, whereas all of the I2-cell-supplemented fish survived. These results show that L. lactis subsp. lactis I2 exerted beneficial effects as a probiotic and has potential as an alternative to antibiotics for the prevention of streptococcosis in aquaculture. (C) 2012 Elsevier B.V. All rights reserved.
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