Research Article: Effects of diet supplementation with different level of Celmanax® (Saccharomyces cerevisiae cell wall with Mannan-Oligosaccharides) on health, environmental stress and Yersiniosis in Oncorhynchus mykiss

This study aimed to investigate the effects of complementary rainbow trout diets with different concentrations of Celmanax® (active compounds of Saccharomyces cerevisiae with mannan-oligosaccharide (MOS)) on immune responses, pressure resistance and resistance to Yersiniosis.Rainbow trout were fed with a diet containing various concentration levels of S.cerevisiae with MOS (prebiotic) (0, 0.1, 0.5 and 1%) for 60 days.While evaluating some of the parameters of the immune system, the blood samples were prepared from the tuber stem vein every 30 days.On day sixty of the study, various stress tests including temperature increases, hypoxia and induction of experimental disease with Yersinia ruckeri were also performed in all the experimental groups.