Abstract
The study investigated immunobiological indicators of natural resistance in Karakul lambs. Indices of natural resistance to conditionally pathogenic microorganisms were measured to determine the general anti-infective resistance of Karakul lambs. The amount of total protein, their fractions and immunoglobulins in the perfusion fluid passed through the blood system of the gastrointestinal tract of lambs in the first 48 hours after birth and after 48 hours of postnatal life of Karakul lambs was determined. Also, the titer of antibodies against conditionally pathogenic microorganisms in blood serum of Karakul lambs of different ages was determined, their importance in formation of colostral and natural active immunities was analyzed.
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