We developed means to deliver multiple heterologous antigens on dual plasmids with non-antibiotic-resistance markers within a recombinant attenuated vaccine stress of serotype Typhimurium. such RASVs is normally introduction of the gene encoding an antigen either in the chromosome or on the self-replicating plasmid with the capacity of inducing a defensive immune system response. The strength… Continue reading We developed means to deliver multiple heterologous antigens on dual plasmids