At present, the invention is a variant of Salmonella enteric 393.4vac strain, which includes Waal gene. In addition, it involves the procedure for the production of this variant of Salmonella (entritdis 394vac) and recombinant avian vaccines including this variant.La presente invencion se refiere a una cepa mutante de Salmonella enteritidis 3934vac que comprende una delecion del gen waal. Ademas se refiere a un procedimiento para generar dicha cepa mutante de Salmonella enteritidis 3934vac y una vacuna recombinante aviar que comprende dicha cepa mutante
