The immunological status of broiler chickens against the background of the use of polysaccharide fraction of brown algae

Poultry farming in Russia is developing rapidly. The ability to obtain high-quality products for a minimum period of fattening of farm birds guarantees the country's food security and puts this industry in priority compared to other subsectors of animal husbandry. Currently, various feed additives are used in the feeding of farm birds, which contribute to a maximum increase in productivity while reducing the technological period of cultivation. The aim of the study was to determine the immunological status of broiler chickens against the background of the use of polysaccharide fraction of brown algae in compound feeds. The study was carried out on broiler chickens of the Smena 9 cross in the conditions of the Zagorskoye EPC in accordance with the VNITIP methodology. In each group there were 30 heads of chickens, kept without sex separation up to the age of 35 days in compliance with all technological parameters. In each group there were 30 heads of chickens, kept without sex separation up to the age of 35 days in compliance with all technological parameters. Phagocytosis parameters, lysozyme activity, serum bactericidal activity, and the concentration of immunoglobulins of classes A, M, and G were determined in the blood according to generally accepted methods. The polysaccharide fraction of brown algae contains mainly fucoidan. Fucoidan is a sulfated polysaccharide found in the cell walls of brown algae. Fucoidan has strong and important biological properties, including antiviral, antitumor, antioxidant, anticoagulant, immunomodulatory, antithrombotic, anticomplementary, and antiproliferative properties with potential benefits as immunostimulants and growth promoters in birds. In the course of the study, it was found that the use of polysaccharide fraction in the diets of broiler chickens is characterized by a stimulating effect on the factors of innate immunity, which is manifested in the activation of phagocytosis processes, an increase in bactericidal and lysozyme activity of the blood serum of broiler chickens. It should be noted that changes in the immunological status of chickens positively correlate with an improvement in zootechnical indicators.

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