Investigations were carried out on adhesive features of microorganisms in digestive tract of Japan quails, both unvaccinated ones and those twice treated with Salmonella enteritidis vaccine TALOVAC 109 SE. It is known that the ability of normal intestinal microflora to adhere to wall cells of digestive tract is essential in the formation of colonizational resistance, which is related with the constituent part of immunological status of macroorganism. In this respect our attention was focused on the effect of vaccination upon the ability of representatives of intestinal microbiocenosis in quails to adhere to intestinal wall cells. The results of investigations show that adhesive features of separate microflora strains in the intestine of quails are different independently of whether they were secreted from digestive tract of vaccinated or unvaccinated quails. However, mean values of adherence of intestinal microorganisms of vaccinated and unvaccinated quails indicate that vaccination considerably adds to t...