The effects of Bio-Mos on lamb growth and immune function

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2009-05-15

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The objective of this study was to evaluate the effects of inclusion of Bio-Mos in the growing ration for weaned lambs on growth rate, feed efficiency, and clinical measures of health of the lambs. Mannan oligosaccharides (MOS), when included as a supplement to the diet, have been shown to have a positive effect on immune response in several species and in turn, positively affect the growth of the animal. MOS are commercially available as BioMos?, which is a nutritional supplement manufactured by Alltech, Inc. out of Nicholasville, KY. Forty-seven weaned Suffolk ? Hampshire (n=47) lambs were used in this trial. Of the group, twenty (n=20) were ewe lambs and twentyseven (n=27) were wether lambs. The lambs were placed on their assigned diets and remained on the trial for a four week period (d+28). All responses evaluated in this study were influenced by time (p < 0.05) over the 28-d trial. A GENDER ? WEEK interaction was observed for ADG and feed conversion (p < 0.05). Control lambs tended (p = 0.10) to have a higher intake over the 28-d period in comparison to Bio-Mos fed lambs. There were no statistically significant differences (p < 0.05) between control and Bio-Mos fed lambs for any of the growth parameters that were measured. There was a tendency (p = 0.10) for GENDER ? WEEK to influence intake. Gender also tended to interacted with diet (GENDER ? DIET, p = 0.09) to influence intake over the trial period. A GENDER ? WEEK interaction was observed (p < 0.05) for feed conversion. Diet influenced fecal pH (p < 0.05). This study indicates Bio-Mos had minimal influence on growth and health.

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