Intestinal infections of young farm animals have very importance among the infectious diseases. In the list of measures to combat with them the main methods are treatment sick animals with antibiotics, sulfa drugs, and nitrofurans. However, the use of antibacterial agents often leads to the death of the normal microflora, breaking microbiocenosis of gastrointestinal tract, the appearance of microorganisms having resistance to drugs to lower quality products. In this regard, the direction of biotechnology, which designs and creation of environmentally friendly microbial drugs for prophylactic efficiency is very important.
Newborns, Escherichia coli, antagonistic properties, bile, hydrochloric acid
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