Use of probiotics to enhance growth, stimulate immunity and confer disease resistance to Aeromonas salmonicida in rainbow trout (Oncorhynchus mykiss )

• DOI: 10.1111/are.13099
• Publication Date: 2016-06-01T09:38:54Z
• Authors: Youngjin Park; Seunghan Lee; Jeongwhui Hong; Doyoung Kim; Mohammad Moniruzz...; Sungchul C Bai
• Keywords: Aeromonas salmonicida; Bacillus licheniformis

An 8-week feeding trial was conducted to evaluate the effects of dietary probiotics on growth, non-specific immune responses and disease resistance in juvenile rainbow trout, Oncorhynchus mykiss. Fish averaging 5.8 ± 0.8 g (mean SD) were fed one five experimental diets; control (Cont), four other diets prepared by supplementing single 1 (Bacillus subtilis; SP1, 0.5%), 2 licheniformis; SP2, multi-probiotics (B. subtilis + B. MP, 0.5%) oxytetracycline (OTC) at 5 OTC kg−1 diet. After 8 weeks trial, weight gain specific growth rate fish SP2 significantly higher than those Cont diet (P < 0.05). Superoxide dismutase (SOD) lysozyme activities MP There no significant differences SOD among diets. In challenge test with Aeromonas salmonicida for 15 days, showed cumulative survival However, there Although a little advantage terms responses, or are equally effective statistically. These results indicate that had equal beneficial as an antibiotic replacer performance, trout.