Abstract:
This article includes the results of experiments on a flock of chickens. Experiments have been conducted in order to assess the comparative immunological efficacy of different vaccines strains used in immunization against infectious avian bronchitis. Now it is a tendency to develop large production of substances and biologically active products, preparations of microorganisms, premix, growth stimulators, which are used for increase body mass, immunity, the percentage of viability and physiological resistance of the body. As a biologically active product, immunocorrectors is the 10% hydro- alcoholic solution of propolis. The propolis is considered a true gift of nature because the propolis includes the most useful organic elements. Propolis samples from different geographic origins were investigated for their antibacterial (against Staphylococcus aureus and Escherichia coli), antifungal (against Candida albicans) and antiviral (against avian influenza virus) activities. In this study data are presented confirming reduced post-vaccination immunological efficacy in chickens vaccinated at one day old and immune stimulatory effect and when the vaccine is administered in combination with the 10% hydro- alcoholic solution of propolis recommended by the instruction. In both cases was administrated the vaccine Ma5+Clon30 with drenching water and spray method. The better immunological effect was obtained on the group of chickens which were vaccinated with strains Ma5+Clon30 in combination with the 10% hydro- alcoholic solution of propolis.