Всероссийский научно-исследовательский институт физиологии, биохимии и питания животных – филиал Федерального государственного бюджетного научного учреждения «Федеральный научный центр животноводства – ВИЖ имени академика Л.К. Эрнста»
The object was to study effect of probiotic preparation based on 4 strains of lactobacilli in the calves at the age of 5 weeks. In two trials preparation was given to 10 calves daily during 21 day at the dose 2×1010 CFU (dry form) or 8×1010 CFU (fluid form) per calf. At the end of study period, the indices of blood profile and growth rate did not significantly differ in the study and control groups, but one month after the end of study period, the level of leucocytes in the blood was elevated in the treatment group (P<0.05) and mean daily LWG was increased vs control (P<0.05), manifesting the prolonged action of probiotic. Probiotic preparations did occur a positive action on intestinal microflora; bacilli Klebsiella and fungi Candida were absent in the fecale of calves that received probiotic, although they were revealed in control group. On the authorts opinion, a prolonged action of preparation was due to the length of the time period needed for lactobacilli applicated to colonize the intestinal tract and to occupy niche in indigene microflora.
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