FIELD: biotechnology.
SUBSTANCE: invention represents a Salmonella microorganism for preventing or reducing the probability of infection of a subject with a virulent microorganism Salmonella, wherein said microorganism comprises a mutation with loss of function in dam gene and at least one mutation with loss of function in gene selected from group consisting of sifA, spvB and mgtC.
EFFECT: invention enables preventing and reducing the probability of infection of the individual with a virulent Salmonella microorganism.
17 cl, 8 dwg, 2 tbl, 3 ex
