has role protective antigen role protective antigen Mycobacterium tuberculosis protein EsxA Oliver He Protegen ID: 104; NCBI Gene GI: 886209; NCBI Protein GI: 57117165; NCBI Protein Accession: NC_000962.2; NCBITaxon: 1773 Allen Xiang protein The heterologous prime-boost strategy of live Salmonella vaccine expressing Mycobacterium tuberculosis fusion antigen Age5B-ESAT6 (esxA) from the chromosome followed by a systemic boost of antigen and adjuvant reduced the levels of M. tuberculosis bacteria in the lungs and spleen to the same extent as BCG. Additionally, this vaccination regimen was observed to be statistically equivalent in terms of protection to immunisation with BCG [PubMed: 19755145].