RECOMBINANT AVIRULENT SALMONELLA THAT EXPRESS GAMETE-SPECIFIC ANTIGENS AND ANTIFERTILITY VACCINES THEREOF

摘要

Avirulent microbes which include a recombinant expression system encoding a gamete-specific antigen, are disclosed. The microbes can be used in compositions to immunize a vertebrate subject against the gamete-specific antigen, thereby preventing or reducing conception rates in the subject to which they are administered.