HEMATOLOGICAL PARAMETERS OF BROILER CHICKENS USING PROBIOTICS
Abstract
The widespread use of antibiotics to stimulate growth and prevent bacterial infections in poultry has led to the emergence of resistant strains of bacteria. In addition, drug residues in meat directly or indirectly threaten human health and environmental safety. Against the background of this problem, there was a need to develop a new method of stimulating the growth of poultry and increasing its resistance. The aim of the work was to determine the effect of different concentrations of the probiotic B. coagulans on the hematological parameters of broiler chickens. The research was conducted in the conditions of the vivarium of the Faculty of Veterinary Medicine of the Sumy National Agrarian University in October 2023. Broiler chickens (cross Cobb- 500) were chosen as the object of research, from which 4 research groups were formulated, and one control group of 25 heads each. Research methods were used in the work: hematological, biochemical, physiological and statistical methods of blood serum research. In the experimental groups, an increase in the number of erythrocytes and leukocytes was recorded in the first by 45.54-4.82%, in the second by 58.41-18.63%, in the third by 101.48-25.44% (*Р<0, 05). In the blood serum of experimental groups of chickens, the level of platelets in the first group decreased by 15.85%, in the second group by 21.54%, and in the third group by 34.14%. In the chickens of the third experimental group, the level of cholesterol decreased by 24.77%, triglycerides by 54.80% (*Р<0.05), urea by 34.13%, and creatinine by 21.69%. The content of total protein and globulin in the chickens of the third experimental group was probably higher by 56.27 and 70.99%, respectively (*Р<0.05), compared to the control groups. The activity of the enzymes aspartate aminotransferase and alanine aminotransferase was similar in the experimental and control groups, which proves the absence of toxic effects of the probiotic B. coagulans in different concentrations (1×105, CFU/g, 1×107, CFU/g, 1×109, CFU/g) on internal organs and tissues. The practical value of the study lies in the prevention of dysbacteriosis and immunodeficiency in broiler chickens. The perspective of further research in this direction is to determine the influence of B. coagulans on carcass properties and meat quality.
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