[The intestinal ecosystem of mice after administration of a polyvalent oral vaccine].

Bacterial antigens orally administered, have been showed by many Authors capable to stimulate immunity system, hinding thus the pathogen flora from gut-colonization. Founding on these findings, AA. of the present paper intend to point out by collected microbial data and M.E.S. photos, the activity of an oral polyvalent vaccine made by lysates strains of E.coli, enterococci, staphylococci and P.vulgaris, on normal intestinal flora of mice contemporaneously administered with a pathogenic strain of Salmonella enteritidis. Vaccine showed himself to be able enough to limit alterations of intestinal flora due to infection by the pathogens.